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The Observer is coming back to FOX, but definitely not staying on theFringe.Gotham has booked its latest Bat-villain for Season 4, as Michael Cerveris masks us as DC villain Professor Pyg.

PerTVLine, the formerFringe favorite will appear in a multi-episode Season 4 arc as Professor Pyg, known in the comics as the schizophrenic, mask-wearing Lazlo Valentin, leader of the Circus of Strange. Cerveris seems to be making a habit of filming TV supervillain roles in New York, as the actor was recently seen playing Ramses for Amazon’sThe Tick.

Elsewhere ofGotham Season 4, dubbed “Dawn of Night,” we knowTeen Wolf alum Crystal Reed will take the role of Sofia Falcone, the intelligent and calculating daughter of Don Falcone. We also knowScarecrow will return,Alexander Siddig’s Ra’s al Ghul will have a larger presence on the series going forward, as will Butch Gilzean after the reveal that his real name was actually “Cyrus Gold” (akaSolomon Grundy). And did someone sayproto-Batsuit?

We’ll see more asGotham gears up for a September 21 premiere, so watch the latest trailer below and stay tuned.