| Chi McBride | Detlef Bierstedt | Steven Harper | | |  |
| Loretta Devine | Katja Nottke | Marla Hendricks | | | |
| Anthony Heald | Michael Pan | Scott Guber | | | |
| Sharon Leal | Vera Teltz | Marylin Sudor | | | |
| Jeri Ryan | Anke Reitzenstein | Ronnie Cooke | | | |
| Michael Rapaport | Oliver Rohrbeck | Danny Hanson | | | |
| Fyvush Finkel | Ulrich Voß | Harvy Lipschutz | | | |
| Jessalyn Gilsig | Melanie Pukaß | Lauren Davis | | | |
| Nicky Katt | Nicolas Böll | Harry Senate | | | |
| Rashida Jones | Tanja Geke | Louisa | | | |
| Tom McCarthy | Peter Flechtner | Kevin Riley | | | |
| Joey Slotnick | Stefan Krause | Milton Buttle | | | |
| Kathy Baker | Karin Buchholz | Meredith Peters | | | |
| China Shavers | Maxi Deutsch | Brooke Harper | | | |
| Jon Abrahams | Gerrit Schmidt-Foß | Zack Fisher | | | |
| Heavy D | Bernd Schramm | Mr. Lick / Big Boy | 1-3 | | |
| Troy Winbush | Dirk Müller | Aaron Lipschultz | 2 | 18 | |
| Jeanette O'Connor | Katarina Tomaschewsky | Agnes | 4 | Feldpost | |
| Tamyra Gray | Magdalena Turba | Aisha Clemens | 3 | | |
| Brian Beegle | Michael Baral | Alex | 3 | Nach dem Sturm | |
| Taran Killam | Wanja Gerick | Alex Buchanan | 4 | Schwarz und weiß | |
| Russell Richardson | Björn Schalla | Amaad Crenshaw | 2 | 21 & 22 | |
| Jeanette Brox | Dascha Lehmann | Amy Wilkes | 3 | 1 | |
| Aldis Hodge | Julien Haggège | Andre | 2 | Das Unwort | |
| Jenny Gago | Monica Bielenstein | Angela Sanchez | 4 | 2 | |
| Teal Redmann | Tanya Kahana | Annie Webb | 1 | 15 | |
| Kevin Fabian | Matthias Klages | Ansager | 2 | Das Fest der Liebe | |
| Peter Moore | Matthias Klages | Ansager beim Wettkampf | 1 | 18 | |
| Gary Anello | Gerald Schaale | Anwalt Berenson | 1 | 7 | |
| Paul Willson | Kaspar Eichel | Anwalt Conlin Barker | 2 | 22 | |
| Christopher Neiman | Gunnar Helm | Anwalt George Fenn | 1 | Volle Breitseite | |
| Lisa Kaminir | Cornelia Meinhardt | Anwältin Susan Abrams | 1 | 7 & 17 | |
| Venus DeMilo | Tanya Kahana | April | 1 | Mit harten Bandagen | |
| Jessica Lugo | Catrin Dams | Ariana Cortez | 3 | 9 | |
| Franklin Dennis Jones | Gerd Grasse | Army Casualty Assistance | 4 | Feldpost | |
| Sal Viscuso | Norbert Gescher | Arthur Ryan | 2 | 8 | |
| Christopher Motyka | Tommy Morgenstern | Asa Johnson | 3 | Und Tschüss | |
| Joyce Guy | Almut Zydra | Audrey Nixon | 2 | 9 | |
| Cody Kasch | Hannes Maurer | Austin Cooper | 2 | 12 | |
| Fuschia | Arianne Borbach | Barbara Darnell | 4 | Agentin ohne Herz | |
| Kris Murphy | Arianne Borbach | Barbara Renner | 4 | Weihnachtsüberraschungen | |
| Kris Murphy | Helmut Gauß | Barry Warner | 2 | Sabotage | |
| Courtney Peldon | Sarah Riedel | Becky Emerson | 3-4 | | |
| Seymour Cassel | Hasso Zorn | Bernie Willis | 1 | Mit Pauken und Trompeten | |
| Judith Hoag | Katharina Koschny | Beth Thomas | 2 | 12 | |
| Kevin Dunn | Hans Hohlbein | Big Ed | 4 | Mit Herz und Handschellen | |
| Matthew Lawrence | Dominik Auer | Billy Deegan | 4 | 14 | |
| Craig Gellis | Dirk Müller | Bo | 4 | 8 | |
| Gary Carlos Cervantes | Elmar Gutmann | Bob Rivera | 2 | 12 | |
| Giuseppe Andrews | David Turba | Bobby Mendoza | 2 | 17 | |
| Adam Mayfield | David Turba | Bobby Renfroe | 1 | 3 | |
| Johnny Lewis | Dennis Schmidt-Foß | Bodhi | 3 | 3 | |
| Johnny Pacar | Ozan Ünal | Boone | 3 | 4 | |
| Phillip Van Dyke | Tommy Morgenstern | Brian Harrower | 3 | 9, 11 & 20 | |
| Adam Hendershott | Michael Wiesner | Brian Hunt | 2 | 18 | |
| Kenny Lao | Tommy Morgenstern | Brian Li | 2 | Schlammschlachten | |
| Richard Holden | Gunnar Helm | Bruce Soll | 3 | Hoch gepokert | |
| Kevin Cooney | Peter Groeger | Bürgermeister | 3 | 22 | |
| Christopher Babers | Konrad Bösherz | Calvin Jobs | 2 | Die Mörderin | |
| Brent Sexton | Olaf Reichmann | Calvin Scott | 1 | 18 | |
| Sean Young | Heike Schroetter | Candy Sobell | 4 | 2 | |
| Taryn Manning | Maxi Deutsch | Cara Glynne | 2 | 5 | |
| F.J. Rio | Lutz Schnell | Carl | 3 | 1 & 2 | |
| Marisa Brown | Ilona Otto | Carly | 2 | Die Sexfalle | |
| Natalia Baron | Andrea Solter | Carmen Torres | | | |
| Rainbow Borden | Bernhard Völger | Carmen's Freund | 4 | 7 | |
| Ashley Tisdale | Marie-Luise Schramm | Carol Prader | 1 | 5 | |
| Amanda Aday | Melanie Hinze | Carrie Jenkins | 2 | 21 | |
| Gregg Daniel | Thomas Wolff | Charles Bailey | 2 | 8 | |
| Dennis Miller | Jörg Hengstler | Charlie Bigsby | 4 | 5-7 | |
| Indigo | Sarah Méndez García | Cheyenne Webb | 3 | 1, 2, 4, 6, 8 & 9 | |
| Lindsay Hollister | Julia Ziffer | Christine Banks | 1 | 10, 12 & 18 | |
| Erica Hubbard | Sarah Riedel | Cindy | 2 | 14 | |
| Christine Lakin | Julia Koberstein | Cindy | 2 | 20 | |
| Jamie Lauren | Manja Doering | Cindy | 1 | Nackte Tatsachen | |
| Lyndsay Martin | Dascha Lehmann | Cindy Adams | 4 | 5 | |
| Missy Yager | Sabine Arnhold | Claire Ellison | | | |
| Ronny Cox | Werner Ehrlicher | Claires Vater | 3 | 22 | |
| Boris Kodjoe | Johannes Berenz | Coach Derek Williams | 3 | 10-12 | |
| Casey Sander | Reinhard Scheunemann | Coach Macklin | 2 | 17 | |
| David Larsen | Johannes Albrecht | Cole Parsons | 3 | 15 | |
| David Larsen | Michael Baral | Cole Parsons | 3 | 17 | |
| Joey McIntyre | Matthias Hinze | Colin Flynn | | | |
| Ashley Bell | Julia Koberstein | Colleen | 4 | In Nöten | |
| D Smoke | Rainer Fritzsche | Cortez | 3 | 4 | |
| Colleen McGrann | Monica Bielenstein | Cynthia Grier | 1 | 12 & 13 | |
| Will Collyer | Julius Jellinek | Dan | 4 | Schwarz und weiß | |
| Sarah Thompson | Luise Helm | Dana Poole | 1-2 | | |
| Scott Vickaryous | Dennis Schmidt-Foß | Daniel Evans | 1 | 19-22 | |
| Ryan Joseph | Michael Baral | Danny | 1 | Eine verhängnisvolle Affäre | |
| Dempsey Pappion | David Turba | Darren | 2 | Ein peinlicher Auftritt | |
| Michael Jai White | Erich Räuker | Darren Schofield | 1 | 18 | |
| GQ | Julien Haggège | Daryl | 3 | 21 | |
| David Conrad | Viktor Neumann | Dave Fields | | | |
| Brian Dietzen | Norman Matt | David Caplan | 3 | 2 | |
| Joel Polis | Michael Narloch | Dawson | 1 | 11 | |
| Eric Fleeks | Uwe Jellinek | Dawson | 1 | 3 | |
| Jessica Ferrarone | Claudia Urbschat-Mingues | DeAngelo | 3 | 21 | |
| Katie Orr | Tanya Kahana | Debbie | 3 | Harter Entzug | |
| Tamara LaSeon Bass | Tanya Kahana | Debbie Nixon | 2 | | |
| Marieh Delfino | Katja Primel | Denise DeMarcos | 2 | 2 & 3 | |
| Troy Evans | Tom Deininger | Dennis Banks | 1 | 10 & 18 | |
| Christina Chauncey | Katharina Koschny | Detective Connelly | 4 | 2 | |
| Jody Wood | Helmut Gauß | Detective Danby | 2; 3 | 21, 22; 1, 2, 6, 9 & 14 | |
| James Martin Kelly | Werner Ziebig | Detective Kevin Santiago | 3 | 18 | |
| Gregg Henry | Jan Spitzer | Detective McGill | 2 | 12 | |
| Gregg Henry | Udo Schenk | Detective McGill | 1 | Ausnahmezustand | |
| Jody Wood | Gerald Paradies | Detective Wallace Denby | 1 | 8, 12 & 15 | |
| Jody Wood | Bernd Schramm | Detective Wallace Denby | 1 | 22 | |
| Matt Lutz | Ricardo Richter | Devin Rickman | 3 | Coming Out | |
| Kayla Ewell | Angela Ringer | Dianne | 4 | Sorgenkinder | |
| Brenden Jefferson | Michael Baral | Dillon | 4 | Heiße Eisen | |
| Davetta Sherwood | Susanne Kaps | Dina Fallow | 4 | 3 | |
| Rachael Bella | Cathlen Gawlich | Ditto | 4 | Feldpost | |
| Jesse D. Goins | Helmut Gauß | Doktor | 2 | 2 | |
| Tim Truby | Gunnar Helm | Doktor | 1 | (M)oralapostel | |
| Bruce French | Friedrich Georg Beckhaus | Doktor | 4 | Unter Strom | |
| James Kohli | Felix Spieß | Doktor | 1 | 1 | |
| Mary Joy | Sonja Deutsch | Dolores Lanagan | 3 | Der Sex-Prozess | |
| Luke Eberl | Hannes Maurer | Dominick Avery | 4 | Sorgenkinder | |
| Bret Harrison | Timmo Niesner | Doug Baer | 3 | 12 | |
| John Srednicki | Nicolás Artajo | Doug Hunt | 1 | Schlagkräftige Argumente | |
| Ron Morehouse | Felix Spieß | Doug Small | 3 | 9 | |
| Erich Anderson | Kaspar Eichel | Douglas Barnes | 1 | 19 | |
| Leslie Jordan | Michael Nowka | Dr. Benjamin Harris | 2 | 1, 2, 7, 8, 17 | |
| Michael O'Neill | Jan Spitzer | Dr. Bernard Colbert | 2 | 2, 5, 6 & 9 | |
| Michael Crider | Reinhard Kuhnert | Dr. Bernard Morris | 2 | 22 | |
| Mira Delaney | Liane Rudolph | Dr. Cahill | 1 | 8 | |
| Stephanie Dunnam | Katarina Tomaschewsky | Dr. Evette Landers | 4 | 7 | |
| Victor McCay | Michael Narloch | Dr. Julius Stein | 4 | 7 | |
| Nick Jameson | Rainer Doering | Dr. Lipton | 1 | 6 | |
| Jill Remez | Nina Herting | Dr. Nancy Morrison | 2 | 16 | |
| Sam Temeles | Gerald Schaale | Dr. Silver | 4 | Bittere Erkenntnis | |
| Harry S. Murphy | Werner Ziebig | Dr. Spears | 1 | 18 | |
| Edwin Morrow | Tobias Müller | Duane | 3 | Shakespeare in Noten | |
| Ben Lang | Ozan Ünal | Eddie | 3 | Schwarz auf Weiß | |
| Edward Carnevale | Lutz Schnell | Eddie | 4 | Weihnachtsüberraschungen | |
| Jeris Poindexter | Raimund Krone | Eddie Clemens | 3 | 20 | |
| Jo McGinley | Monica Bielenstein | Ellen Mulhern | 3 | Rabeneltern | |
| Monique Edwards | Katharina Koschny | Ellen Rausch | 2 | 15 | |
| Camryn Manheim | Sonja Deutsch | Ellenor Frutt | 1 | Mit harten Bandagen | |
| Susan Allison | Nina Herting | Emily Ward | 1 | 1 | |
| Yorlin Madera | Charles Rettinghaus | Enrico Puentes | 3 | 7 | |
| Chris Heuisler | Wanja Gerick | Eric Dunefsky | 2 | Die Ballkönigin | |
| Ever Fecske | Angela Ringer | Ester Guttman | 3 | Spionage | |
| Ever Fescke | Angela Ringer | Ester Guttman | 3 | 16 | |
| Jonathan Bennett | Felix Spieß | Ethan Guest | 3 | 19 | |
| Dana Wheeler-Nicholson | Diana Borgwardt | FBI Agentin Monica Price | 4 | 8 | |
| Method Man | Lutz Schnell | Flash Master K | 3 | 21 | |
| Philippe Durand | Viktor Neumann | Französischer Kellner | 3 | Falsches Spiel | |
| Megan Cavanagh | Almut Zydra | Frau von der Fürsorge | 3 | 2 | |
| Joey Vacchio | Marius Clarén | Freddie | 4 | Feldpost | |
| Kale Browne | Frank-Otto Schenk | Gallerist | 4 | Sorgenkinder | |
| Ted Marcoux | Peter Reinhardt | Gary Campbell | 2 | 10 | |
| Colm Feore | Florian Krüger-Shantin | George Guber | 1 | Blinde Date | |
| Eric Jungmann | Wanja Gerick | George Howe | 1 | 6 | |
| Duane R. Shepard Sr. | Werner Ziebig | Gerichtsverwalter | 4 | 1 | |
| Paul Jerome | Matthias Klages | Gerichtsverwalter | 2 | Die Mörderin | |
| Yvette Freeman | Joseline Gassen | Gladys Crenshaw | 1 | Dirty Dancing | |
| Ashley Ta'Mar Davis | Sarah Méndez García | Gloria | 4 | Auge um Auge | |
| Amanda MacDonald | Dascha Lehmann | Gretchen | 4 | Schwarz und weiß | |
| Michael Fairman | Wolfgang Thal | Harold Shaw | 1 | Alle für einen | |
| Robert Katims | Peter Groeger | Harvey's Freund | 3 | 17 | |
| Lucki Wheating | Kerstin Sanders-Dornseif | Helen Mendoza | 2 | Die Sexfalle | |
| Kate Mara | Tanya Kahana | Helena Gelbke | 4 | Mit Herz und Handschellen | |
| Cleo King | Regine Albrecht | Helene Parks | | | |
| Christopher John Fields | Peter Thomsen | Hendersons Anwalt | 1 | Tod eines Lehrers | |
| Christopher Rodriguez Marquette | Timm Neu | Henry Freers | 3 | 4 | |
| Phil Buckman | Charles Rettinghaus | Henry Preston | 4 | 12, 13, 15 | |
| Maureen Flannigan | Antje von der Ahe | Holly Carpenter | 1 | 21 | |
| Van De La Plante | Michael Baral | Howard | 4 | Unter Strom | |
| Jason Dohring | Hannes Maurer | Ian Bridgeman | 3 | 1 | |
| Jason Dohring | Sebastian Schulz | Ian Bridgeman | 3 | 14 | |
| Frank Novak | Werner Ziebig | Interviewer | 1 | 21 | |
| Mandy Patinkin | Erich Räuker | Isaac Rice | 1 | Zum Abschluss freigegeben | |
| Dee Freeman | Claudia Urbschat-Mingues | Isabella Ventura | 4 | 4 | |
| Sam Sarpong | Nico Mamone | Isaiah Walton | 2 | Club der Dicken | |
| Sam Sarpong | Konrad Bösherz | Isaiah Walton | 2 | Schlammschlachten | |
| Miguel Castro | Dennis Schmidt-Foß | J.J. Rivera | 4 | Feldpost | |
| DeJuan Guy | Asad Schwarz | J.T. | 2 | Das Unwort | |
| Milo Ventimiglia | Julien Haggège | Jake Provesserio | 4 | 2, 4 & 5 | |
| Edwin Hodge | Tobias Müller | Jamaal Crenshaw | 1-2 | | |
| David Norona | Matthias Deutelmoser | Jamaal's Anwalt | 2 | 22 | |
| Jane Lynch | Marianne Groß | Jane Morrell | 2 | 2 | |
| Laura Breckenridge | Tanya Kahana | Janice | 1 | 17 | |
| Allison Munn | Julia Kaufmann | Janice Scott | 2 | 16 | |
| Scott Rinker | Sebastian Walch | Jason | 2 | 16 | |
| Gregory Alan Williams | Bert Franzke | Jason Anderson | 1 | 15 & 17 | |
| Ben Easter | Konrad Bösherz | Jason Dunphy | 3 | 18 | |
| Avery Kidd Waddell | Tobias Müller | Jason Harrelson | 1 | 1 & 5 | |
| Corbin Allred | Tim Sander | Jason Paul | 2 | Die Ballkönigin | |
| Jesse Head | Tim Sander | Jason Porter | 4 | Machtkämpfe | |
| Michael Monks | Frank-Otto Schenk | Jeff Schiffer | 3 | 15 | |
| Alana Austin | Julia Koberstein | Jen Kenney | 3 | 3 | |
| Lyndsy Fonseca | Marie Bierstedt | Jenn Cardell | 4 | 2, 4, 5, 7 | |
| Gina Philips | Gundi Eberhard | Jenna Miller | 1 | | |
| Kaj-Erik Eriksen | Till Völger | Jeremy Peters | 1-2 | | |
| Michael Manasseri | Gunnar Helm | Jerome Harrison | 2 | 10 | |
| Majandra Delfino | Yvonne Greitzke | Jill Sharp | 4 | Dunkle Vergangenheit | |
| Blue Deckert | Andreas Grothusen | Jim McNeal | 4 | 8 | |
| Michael Badalucco | Reinhard Kuhnert | Jimmy Berluti | 1 | Mit harten Bandagen | |
| Justin Connor | Felix Spieß | Jimmy O'Shea | 3 | 7 | |
| Kate Norby | Antje von der Ahe | Joannie Hanson | 3 | | |
| Nicole Tarantini | Anja Stadlober | Jody Pierce | 1 | 10 | |
| Jake Richardson | Nico Mamone | Joe Coolidge | 3 | 7 & 8 | |
| Michael Adler | Bodo Wolf | Joel Berenger | 3 | 16 | |
| Datari Turner | Jesco Wirthgen | Joel Rivers | 1 | 3 | |
| Anthony Starke | Matthias Deutelmoser | Joey | 1 | 11 | |
| Chris Olivero | Leonhard Mahlich | John Cardell | 4 | Auge um Auge | |
| Angelo Tiffe | Peter Flechtner | John Kendall | 2 | Fotos mit Folgen (2x16) | |
| Angelo Tiffe | Bernd Schramm | John Kendall | 3 | 9 | |
| Travis Wester | Alexander Doering | John LeBlonde | 1 | 4 | |
| Bob Papenbrook | Uwe Jellinek | Johnathan White | 1 | 5 | |
| Larry Cedar | Gunnar Helm | Johnson | 1 | 13 | |
| Paul Cassell | Felix Spieß | Jonathan Chase | 3 | 7 | |
| Stuart Stone | Jesco Wirthgen | Jordan Murphy | 2 | 15 | |
| Gary Carlos Cervantes | Werner Ziebig | Jorge Alvarez | 4 | Feldpost | |
| Patrick John Flueger | Bernhard Völger | Joseph Prager | 4 | 1 | |
| Daniel Nathan Spector | Stefan Staudinger | Joshua Campbell | 2 | 15 | |
| Andrew Eiden | Michael Wiesner | Joshua Marks | 3 | 4 | |
| Rick Gonzalez | Nico Mamone | Juan Figgis | | | |
| Suzanne Quinn | Nina Herting | Julie Tanner | 2 | Fotos mit Folgen | |
| Thomas Dekker | Fabian Hollwitz | Julien McNeal | 4 | Erpressung | |
| Marco Gould | Konrad Bösherz | Justin Hober | 1 | Zum Abschluss freigegeben | |
| Angela Oh | Nina Herting | Karen | 4 | 1 | |
| Jill Ritchie | Nana Spier | Karen Fitzgerald | 1 | Tod eines Lehrers | |
| Staci Cross | Sarah Méndez García | Karen Moore | 2 | Bombenstimmung | |
| Andy Umberger | Hans-Jürgen Wolf | Keller | 4 | 1 | |
| Stu Lynn | Nina Herting | Kelly Curtis | 3 | Vollgas | |
| Stacy Hogue | Julia Ziffer | Kelly O'Toole | 1 | Romeo und Julia | |
| Kurt Fuller | Peter Reinhardt | Ken Thomas | 2 | 12 | |
| Ryan Bumcrot | Jesco Wirthgen | Kenny Lopez | 1 | 7 | |
| Antwon Tanner | David Turba | Kevin Jackson | 1 | | |
| Justin Lee Clark | Jan-David Rönfeldt | Kevin Talbot | 4 | Heiße Eisen | |
| Te'Amir Sweeney | Tobias Nath | Khalid Mubarik | 4 | 8 | |
| Michelle Monaghan | Dorette Hugo | Kimberly Woods | | | |
| Cheryl Francis Harrington | Claudia Urbschat-Mingues | Krankenschwester | 2 | Klartext | |
| Beth Kennedy | Monica Bielenstein | Krankenschwester | 2 | Sabotage | |
| Sara Van Horn | Dagmar Biener | Krankenschwester | 4 | Unter Strom | |
| Joanna Sanchez | Nina Herting | Krankenschwester Pauline Drier | 1 | 6 | |
| Brian Skala | Michael Baral | Kyle | 3 | Coming Out | |
| Troy Ruptash | Peter Flechtner | Kyle Locklin | 2; 3 | 15, 17; 3 | |
| Jessica Wright | Antje von der Ahe | Kyra | 2 | Sabotage | |
| Eric Barry | Timmo Niesner | Landon | 2 | 10 & 14 | |
| Robert Clotworthy | Roman Kretschmer | Larry, Radio DJ | 3 | 15 | |
| Henry LeBlanc | Matthias Klages | Laurence Holt | 1 | 7 | |
| David Alan Grier | Thomas Petruo | Laurence Williams | 2 | 20 | |
| Garikayi Mutambirwa | Tobias Nath | Lawrence Sorrenson | 4 | Schwarz und weiß | |
| Scott Alan Smith | Peter Flechtner | Lehrer vom Williams-College | 2 | 3 | |
| Billy Aaron Brown | Michael Baral | Leo Peterson | 1 | Vorsicht Kamera | |
| Tony Todd | Helmut Krauss | Lester Lipschultz | 2; 3 | 18; 8 | |
| Khanya Mkhize | Anja Stadlober | Lettie Ventura | 4 | 4 | |
| Kala Savage | Ilona Otto | Lindsey | 3 | Falsches Spiel | |
| Elizabeth Jayne Hong | Katja Strobel | Lisa | 4 | 3 | |
| Bianca Kajlich | Ulrike Stürzbecher | Lisa Grier | 1 | | |
| Karis Campbell | Bea Tober | Lisanne DeMarco | 4 | Dunkle Vergangenheit | |
| C.J. Thomason | Ozan Ünal | Little Ed | 4 | Mit Herz und Handschellen | |
| Lynn Whitfield | Katarina Tomaschewsky | Louanna Harper | 2 | 4, 6 & 7 | |
| Lyndsey Gayer | Julia Koberstein | Lyndsey | 3 | 12 | |
| Harris Laskawy | Frank Ciazynski | Malcolm Digger | 2 | 21 | |
| Daniel Roebuck | Uwe Büschken | Mann vom Orchester | 1 | 15 | |
| Shvona Layette Williams | Manja Doering | Marcia | 1 | Mit Pauken und Trompeten | |
| Beth Littleford | Nina Herting | Marcia Fennel | 2 | 2 | |
| La Monde Byrd | Rainer Fritzsche | Marcus | 3 | Nach dem Sturm | |
| Lou Briggs | Werner Ziebig | Marcus Pratt | 3 | 7 | |
| Cara DeLizia | Julia Ziffer | Marcy Kendall | | | |
| Karen Starc | Marie Bierstedt | Mare Bloom | 2 | 20 | |
| Helen Slater | Ulrike Mai | Margaret McNeal | 4 | 8 | |
| Julie Berman | Angela Ringer | Margo | 3 | 2 | |
| Dana Davis | Anne Helm | Marie Ronning | 1 | 18 & 20 | |
| Amanda Fuller | Nana Spier | Marie Watson | 4 | 1 | |
| Elizabeth Rice | Julia Kaufmann | Marilee Morford | 4 | Dunkle Vergangenheit | |
| Riley Smith | Wanja Gerick | Mark | 3 | 3 | |
| Tyler Sedustine | Nico Mamone | Mark Clayton | 3 | Angeklagt | |
| Christopher Cousins | Jan Spitzer | Mark Tanner | 2 | 16 | |
| Brian Sites | Wanja Gerick | Mark Thomas | 4 | 3 | |
| Angela Paton | Evelyn Gressmann | Marlene Walsh | 1 | 6 & 7 | |
| Debbi Morgan | Heike Schroetter | Marsha Shinn | | 2+3 | |
| Christina Haag | Heidrun Bartholomäus | Marsha Walker | 1 | Blinde Date | |
| Todd Hurst | Michael Wiesner | Marshall Fulton | 2 | 6 | |
| Josh Keaton | Dennis Schmidt-Foß | Martin Andrews | 2 | 14 | |
| Steve Stapenhorst | Werner Ziebig | Martin Jacobson | 1 | 21 | |
| Glenn Taranto | Erich Räuker | Marty Glass | 4 | 5 | |
| Billy Zane | Martin Keßler | Matthew Baskin | 2 | 1, 2, 4, 7 | |
| Dean Norris | Gerald Schaale | Matthew Gordon | 1 | 16 | |
| Ben Foster | Niklas Kohrt | Max Warner | 2 | 7 & 13 | |
| Steven Culp | Bernhard Völger | Mel Breen | 2 | 6 | |
| Laurie O'Brien | Constanze Harpen | Melanie Fitzgerald | 1 | Tod eines Lehrers | |
| Callie De Fabry | Susanne Kaps | Melanie Turnball | 3 | 2 | |
| Sarah Hagan | Julia Kaufmann | Melissa | 2 | 12 | |
| Alex McKenna | Tanya Kahana | Melissa | 1 | Blinde Date | |
| Amber Tamblyn | Melanie Hinze | Melissa Campbell | 2 | 10 | |
| Conor O'Farrell | Rüdiger Evers | Michael Evans | 1 | 22 | |
| James Lafferty | Michael Baral | Michael Scott | 1 | Striptease | |
| Michael Stipe | Dirk Müller | Michael Stipe | 4 | Weihnachtsüberraschungen | |
| R.F. Daley | Andreas Müller | Michael Ward | 1 | 1 | |
| R.F. Daley | Werner Ziebig | Michael Ward | 1 | 19 | |
| Vanessa Bell Calloway | Martina Treger | Michelle Ronning | 1 | 17, 18 & 20 | |
| Mercedes McNab | Uschi Hugo | Mickey Tanner | 2 | 16 | |
| Erik Alexander Gavica | Nicolás Artajo | Miguel Perez | 2 | 11 | |
| Bruce Nozick | Stefan Staudinger | Mills | 1 | Im Nahkampf | |
| Betty Garrett | Luise Lunow | Miriam Guber | 3 | 13 | |
| Elyse Dinh | Nina Herting | Miss Kim | 4 | 4 | |
| Leonora Pitts | Heidrun Bartholomäus | Miss Miranda | 4 | Dunkle Vergangenheit | |
| Anne Marie Howard | Karin David | Miss Sofer | 3 | 15 | |
| Lukas Behnken | Marcel Collé | Mitchell | 4 | 3 | |
| Monique Coleman | Julia Meynen | Molly | 4 | 3 | |
| Morgan Kibby | Catrin Dams | Molly Kendall Carmody | 1 | 17 & 20 | |
| Keri Lynn Pratt | Julia Meynen | Molly Sobel | 4 | 2 | |
| Rolonda Watts | Liane Rudolph | Monica Clemens | 3 | 20 | |
| Sam Doumit | Cathlen Gawlich | Monica Peete | 3 | 2 | |
| Ariana Delawari | Anja Stadlober | Monique | 4 | 2 | |
| Tommy Smeltzer | Florian Krüger-Shantin | Mr. Cone | 2 | Ein peinlicher Auftritt | |
| Tom Ormeny | Gunnar Helm | Mr. Coolidge | 3 | Das Fest der Liebe | |
| Rick Zieff | Matthias Klages | Mr. Delgado | 1 | 16 | |
| David Manis | Gerd Grasse | Mr. Delray | 2 | 8 | |
| Robert Maffia | Dirk Müller | Mr. Feldman | 4 | Weihnachtsüberraschungen | |
| Bryan Greenberg | Sebastian Schulz | Mr. Freeman | 4 | 1 | |
| Bryan Greenberg | Michael Baral | Mr. Freeman | 1 | Nackte Tatsachen | |
| Gareth Williams | Gerd Grasse | Mr. Glynne | 2 | 5 | |
| Phil Sciranka | Sebastian Schulz | Mr. Gutton | 1 | Kein Pardon | |
| Tony Pasqualini | Gunnar Helm | Mr. Harrower | 3 | 11 | |
| Joel David Moore | David Turba | Mr. Hartzell | 1 | Kein Pardon | |
| Matt Gottlieb | Werner Ziebig | Mr. Hober | 1 | 22 | |
| Jerry O'Donnell | Olaf Reichmann | Mr. Horst | 2 | Sabotage | |
| Harry Groener | Eberhard Prüter | Mr. Jacobs | 1 | 17 | |
| Nick Kiriazis | Jan-David Rönfeldt | Mr. Landis | 2 | Bettgeflüster | |
| Timothy Landfield | Gerald Schaale | Mr. LeBlonde | 1 | 4 | |
| Daniel Mandehr | Werner Ziebig | Mr. Levy | 3 | 19 | |
| Heavy D | Florian Krüger-Shantin | Mr. Lick / Big Boy | 3 | 22 | |
| Kareem J. Grimes | Ozan Ünal | Mr. Markle | 1 | Kein Pardon | |
| Faran Tahir | Erich Räuker | Mr. Mubarik | 4 | 8 | |
| J. Michael Flynn | Andreas Grothusen | Mr. O'Shea | 4 | 7 | |
| Adam Drescher | Gunnar Helm | Mr. Peretti | 3 | Am seidenen Faden | |
| Michael Harney | Uwe Büschken | Mr. Pierce | 1 | 10 | |
| Tony Adelman | Elmar Gutmann | Mr. Platt | 2 | Fotos mit Folgen | |
| Joel Anderson | Florian Krüger-Shantin | Mr. Richards | 2 | Das Unwort | |
| Stephen Macht | Andreas Müller | Mr. Valone | 3 | 11 & 12 | |
| Larry Anderson | Matthias Klages | Mr. Watson | 4 | 1 | |
| Pat Skipper | Thomas Wolff | Mr. Webb | 1 | 15 | |
| Kathleen M. Darcy | Karin David | Mrs. Baer | 3 | Hoch gepokert | |
| Janet Song | Bea Tober | Mrs. Chan | 4 | 6 | |
| Sheila Shaw | Karin David | Mrs. Coolidge | 3 | 7 | |
| Ginny Harman | Almut Zydra | Mrs. Delray | 2 | Gewissensnöte | |
| Nancy Fassett | Katarina Tomaschewsky | Mrs. Feldman | 4 | Weihnachtsüberraschungen | |
| Liann Pattison | Nina Herting | Mrs. Glynne | 2 | 5 | |
| Amanda Carlin | Heidrun Bartholomäus | Mrs. Guilbert | 3 | 19 | |
| Robin Pearson Rose | Susanne Schwab | Mrs. Harrower | 3 | Wer dick wird, fliegt! | |
| Heidi Heller | Renate Weyl | Mrs. Horst | 2 | Sabotage | |
| Joanne McGee | Nina Herting | Mrs. Judd | 2 | 4 | |
| Annie Grindlay | Nina Herting | Mrs. Kendall | 3 | Das Gesetz der Straße | |
| Carol Bivins | Bea Tober | Mrs. O'Shea | 4 | 7 | |
| Bridgett Newton | Sabine Mazay | Mrs. Poleman | 2 | 9 | |
| D.J. Harner | Constanze Harpen | Mrs. Potter | 1 | (M)oralapostel | |
| Darcy Shean | Dagmar Biener | Mrs. Reese | 4 | 4 | |
| Darcy Shean | Monica Bielenstein | Mrs. Reese | 4 | Dunkle Vergangenheit | |
| Cathy Lind Hayes | Arianne Borbach | Mrs. Stone | 2 | Das Unwort | |
| Laurel Melagrano | Gabrielle Scharnitzky | Mrs. Trotta | 3 | Vollgas | |
| Breon Gorman | Helga Sasse | Mrs. Watson | 4 | 1 | |
| Kira Tirimacco | Sonja Deutsch | Mrs. Wexler | 3 | Vollgas | |
| Ruth Zalduondo | Helga Sasse | Ms. Gutierrez | 4 | 7 | |
| Maya Goodwin | Susanne Geier | Ms. Simkins | 3 | 19 | |
| Kate Skinner | Sabine Walkenbach | Mutter bei Elternabend | 1 | 16 | |
| Blair Wingo | Julia Koberstein | Nancy | 3 | 1 | |
| Kimberlee Peterson | Marie-Luise Schramm | Natalie Stone | 2 | 15 & 20 | |
| Kimberlee Peterson | Ann Vielhaben | Natalie Stone | 4 | Mit Herz und Handschellen | |
| Chris Evans | Konrad Bösherz | Neil Mavromates | 1 | Ausnahmezustand | |
| Stacey Hinnen | Norman Matt | Nick | 4 | Bittere Erkenntnis | |
| Cyd Strittmatter | Sabine Arnhold | Nicole Warner | 2 | 7 & 13 | |
| Rafael J. Noble | Andreas Grothusen | Obdachloser | 4 | Weihnachtsüberraschungen | |
| Anneliza Scott | Gabrielle Scharnitzky | Officer | 3 | 1 | |
| Larry Milburn | Gunnar Helm | Officer #1 | 1 | Ausnahmezustand | |
| Robert Dolan | Matthias Klages | Officer Hart | 2 | Bettgeflüster | |
| James Edson | Werner Ziebig | Officer Kent | 2 | 6 | |
| Scott Reitz | Andreas Müller | Officer Malloy | 2 | Bombenstimmung | |
| Shea Farrell | Elmar Gutmann | Officer Watts | 2 | Ein tragischer Unfall | |
| Chris Flanders | Nico Mamone | Officer Woodly | 1 | Besessen | |
| Blake Bashoff | Dominik Auer | Oswald / Joseph O'Shea | 4 | 7 | |
| Garrett M. Brown | Ernst Meincke | Pater Bill Egan | 3 | 7 & 8 | |
| Anne Archer | Helga Sasse | Patricia Emerson | 3 | 10, 11 & 12 | |
| Justin Lanning | Michael Baral | Patrick | 4 | Bittere Erkenntnis | |
| Chris Nelson Norris | Jan Spitzer | Patrick McCain | 3 | 7 | |
| Barry Livingston | Matthias Klages | Patron | 1 | 18 | |
| Paul Norwood | Rainer Gerlach | Paul Fitzgerald | 1 | 6 | |
| Tom Wilson | Stefan Gossler | Paul Stanton | 3 | 22 | |
| Mary Mara | Arianne Borbach | Pauline Campbell | 2 | 10 | |
| Miko Hughes | Wanja Gerick | Peter Feldman | 4 | 2 & 4 | |
| Gregory Crane | Nicolás Artajo | Peter Nelson | 1 | 4 | |
| Larry Bates | Michael Deffert | Petie Samples | 1 | 3, 6, 11 & 16 | |
| Daniel Kountz | Wanja Gerick | Phill Robeson | 1 | 9 | |
| Barry Sigismondi | Werner Ziebig | Polizist | 2 | 4 | |
| Mark Sweeney | Andreas Müller | Polizist | 1 | 5 | |
| Will Hall | Matthias Klages | Preisrichter | 1 | 19 | |
| Jack Patterson | Gerd Grasse | Priester | 1 | 18 | |
| Patrick O'Connor | Werner Ehrlicher | Priester | 4 | 2 | |
| Maitland Ward | Maria Koschny | Rachel Newman | 2 | 21 | |
| Nicole Fellows | Julia Koberstein | Rae | 3 | 6 | |
| Natasha Melnick | Manja Doering | Rainy Murphy | 4 | 11-13, 15 | |
| Jill Noel | Manja Doering | Randa Horst | 2 | 14 | |
| Derek Ray | Jesco Wirthgen | Randy | 3 | 2 | |
| Derek Ray | Konrad Bösherz | Randy | 4 | Unter Strom | |
| Preston Wigasi Brant | Jesco Wirthgen | Raymond | 1 | Ausnahmezustand | |
| John Paul Pitoc | Michael Deffert | Raymond Nunn | 1 | Mit Pauken und Trompeten | |
| Patrice Walters | Sabine Walkenbach | Rebecca Phillips | 4 | 1 | |
| Vanessa Gloria Perez | Sarah Méndez García | Regina Alvarez | 4 | Dunkle Vergangenheit | |
| Wanya Green | Sarah Méndez García | Regina Washington | 4 | 8 | |
| Nicholas D'Agosto | Nico Mamone | Richard Kinney | 4 | 6 | |
| Jim Abele | Joachim Siebenschuh | Richard Saunders | 1 | 21 | |
| Michael Cavanaugh | Reinhard Scheunemann | Richter Boilings | 4 | 1 | |
| Jim Ortlieb | Reinhard Kuhnert | Richter Jeremy Allen | 1 | Blinde Date | |
| Larry Brandenburg | Karl Schulz | Richter Marcus Weisman | 3 | 18 | |
| John Rubinstein | Rüdiger Evers | Richter Papp | 1 | Mit harten Bandagen | |
| Sean Moran | Michael Narloch | Richter Ryan | 4 | 5 | |
| Armin Shimerman | Hans-Jürgen Dittberner | Richter Semel | 2 | 22 | |
| Nancy Linehan Charles | Regine Albrecht | Richterin | 2 | Die Mörderin | |
| Rosemary Forsyth | Katharina Koschny | Richterin Toft | 3 | 7 | |
| Theodore Borders | Marius Clarén | Rick | 4 | Mit Herz und Handschellen | |
| Leon Frierson | Julius Jellinek | Rick | 4 | Mit Herz und Handschellen | |
| Percy Daggs III | Michael Baral | Rob | 3 | 3 | |
| Philip Weiner | Nico Mamone | Roberts | 1 | Striptease | |
| L.B. Fisher | Rainer Fritzsche | Robin Chambers | 2 | 20 | |
| T.E. Russell | Olaf Reichmann | Roland McClane | 2 | 11 | |
| Nicole Tubiola | Ghadah Al-Akel | Rosie Sanchez | 4 | Unter Strom | |
| Jason Lansing | Julius Jellinek | Ruby | 3 | Vollgas | |
| Jason Lansing | Jesco Wirthgen | Rudy | 3 | Spionage | |
| Mehcad Brooks | Jan-David Rönfeldt | Russell Clark | 3 | 10, 11, 12 & 14 | |
| Ritu Lal | Julia Kaufmann | Sabeen Mubarek | 4 | 8 | |
| J.A.Q. | Ozan Ünal | Sam Gough | 4 | Agentin ohne Herz | |
| Shani Pride | Cathlen Gawlich | Samantha Charles | 4 | Dunkle Vergangenheit | |
| April Grace | Joseline Gassen | Sandra Henderson | 1 | Tod eines Lehrers / Blind Date | |
| Susan Savage | Nina Herting | Sandra Mason | 1 | 2 | |
| Jerry Kokich | Matthias Klages | Sanitäter | 2 | Mit eiserner Hand | |
| Michelle Wolff | Nina Herting | Sanitäterin | 3 | Blinde Wut | |
| Leighton Meester | Sarah Riedel | Sarah Breen | 2 | 6 | |
| Tyler Francavilla | Nico Mamone | Scanlon | 2 | 2 | |
| J. Patrick McCormack | Bodo Wolf | Schuldirekor Hopkins | 2 | 4 | |
| Alana Austin | Sarah Riedel | Schülerin (blond) | 2 | 9 | |
| Natalie Ramsey | Sarah Riedel | Schülerin in Dannys Klasse | 2 | 1 | |
| Barry Wiggins | Thomas Nero Wolff | Schulpsychologe | 4 | Bittere Erkenntnis | |
| Jamie Anne Allman | Svantje Wascher | Sharon | 2 | 5 | |
| LaTanya Richardson | Almut Zydra | Sheila | 3 | 18 | |
| Angela Goethals | Maria Koschny | Sheila Mercer | 3 | 13 | |
| Porscha Coleman | Maria Koschny | Sheila Pepper | 3 | Angeklagt | |
| Adria Dawn | Uschi Hugo | Sherry Monrad | 3 | 16 | |
| Lamya Jezek | Maria Koschny | Sheryl Holt | 1 | | |
| Karen Malina White | Melanie Hinze | Sonia Williamson | 4 | Schwarz und weiß | |
| Brad Wilson | Werner Ziebig | Sonny | 3; 4 | 13 & 21; 3 | |
| Brad Wilson | Gunnar Helm | Sonny | 3 | 12 | |
| Tania Gunadi | Marie Bierstedt | Sri Sumarto | 3 | 12 & 21 | |
| John Colella | Andreas Müller | Staatsanwalt Lockhart | 3 | 7 | |
| Denis Arndt | Rüdiger Evers | Staatsanwalt Roland Hill | 3 | 18 | |
| Julie Claire | Marina Krogull | Staatsanwältin Maskell | 2 | 22 | |
| Marcus Toji | Nico Mamone | Stevens | 1 | Kein Pardon | |
| Scott Klace | Stefan Gossler | Stokes | 3 | 18 | |
| Elizabeth Peña | Martina Treger | Superintendent Vasquez | 3 | 3 & 10 | |
| Michelle Ewin | Ann Vielhaben | Susan | 3; 4 | 6; 4, 12 | |
| Shelly Cole | Ilona Otto | Susan | 1 | Tod eines Lehrers | |
| Samantha Thomas | Ann Vielhaben | Susan Bayer | 4 | 6 | |
| Florence Regina | Gabrielle Scharnitzky | Susan Browne | 3 | 7 | |
| Shannon O'Hurley | Andrea Aust | Susan Gallipagamus | 1 | 13 | |
| JoAnna Garcia Swisher | Ilona Otto | Susan Potter | 1 | 4 | |
| Sarah Jane Morris | Ilona Otto | Susan Strong | 1 | 15 | |
| Mario Soto | Uwe Jellinek | SWAT Commander | 1 | Ausnahmezustand | |
| Marissa Leigh | Manja Doering | Sylvie Platt | 2 | 16 | |
| Eric Leviton | Andreas Müller | Talbot | 1 | 3 | |
| Arjay Smith | Tobias Müller | Taylor Graham | 4 | 5 | |
| Verne Troyer | Santiago Ziesmer | Taylor Prentice | 3 | 18 & 19 | |
| J Barton | Kim Hasper | Thomas McCain | 3 | 6 & 7 | |
| Mark L. Taylor | Michael Nowka | Tim McMahon | 1 | 6 | |
| Alexondra Lee | Diana Borgwardt | Tina Knowles | 1 | Dirty Dancing | |
| Joshua LeBar | Tommy Morgenstern | Tom Powell | 2 | Die Sexfalle | |
| Jordan Tartakow | David Turba | Tom Powers | 1 | Abschlussliste | |
| Lisa Lang | Carmen Katt | Traci Van Meter | 4 | Sorgenkinder | |
| Andreana Weiner | Cathlen Gawlich | Tracy Stoyer | 4 | 3 | |
| Richard Keith | Konrad Bösherz | Trevor James | 3 | Coming Out | |
| Alisa Reyes | Ghadah Al-Akel | Trina Sanchez | 3 | 1, 2 & 4 | |
| Sean Faris | Robin Kahnmeyer | Troy Mooney | 4 | Sorgenkinder | |
| Shad Hart | Timm Neu | Ty Miller | 2 | Klartext | |
| Wesley Jonathan | Ozan Ünal | Tyronn Anderson | 1 | | |
| Will Arnett | Andreas Müller | Verkäufer | 2 | 7 | |
| Toy Connor | Ghadah Al-Akel | Veronica | 1 | Vorsicht Kamera | |
| Phyllis Lyons | Liane Rudolph | Vicky McMahon | 1 | 6 | |
| Scott Allan Campbell | Roman Kretschmer | Vincent Russo | 3 | 11 & 12 | |
| Sherilyn Fenn | Liane Rudolph | Violet Montgomery | 4 | Bittere Erkenntnis | |
| Kevin Sheridan | Jesco Wirthgen | Wallace | 2 | 14 | |
| Neil Flynn | Stefan Staudinger | Walter Andrews | 2 | 14 | |
| Randy Oglesby | Michael Narloch | Walter Grier | 1 | 12 & 13 | |
| Courtney B. Vance | Jörg Hengstler | Walter Harrelson | 1 | Volle Breitseite / Im Nahkampf | |
| Trevor Wright | Michael Wiesner | Walton Hanks | 2 | 16 | |
| Yasmine | Sarah Méndez García | Wanda | 1 | Dirty Dancing | |
| Richard Alan Brown | Fabian Hollwitz | Warren | 3 | Schwarz auf Weiß | |
| Justin Shenkarow | Nico Mamone | Warren Dickson | 2 | Bettgeflüster | |
| Adrian Davis | Julien Haggège | Webster Henderson | 1 | Tod eines Lehrers | |
| RonReaco Lee | Jan-David Rönfeldt | Wesley Poe | 2 | 8 | |
| Whitney Houston | Martina Treger | Whitney Houston | 3 | 22 | |
| Louis Falk | Dominik Auer | Wilbur Stowe | 4 | Mit Herz und Handschellen | |
| Dave Florek | Rainer Gerlach | Will Johnson | 3 | 4 | |
| Jeffrey Pierce | Tim Moeseritz | Will Styros | 4 | Weihnachtsüberraschungen | |
| Aaron Himelstein | David Turba | William Guilbert | 3 | 19 & 22 | |
| Tim Ahern | Ernst Meincke | Yal-Direktor | 3 | Hoch gepokert | |
| Jim Cantafio | Lutz Schnell | Zuhälter | 3 | 1 | |
| N. N. | Manja Doering | Schülerin im Krankenzimmer | 1 | 6 | |
