| Week | Name | Viewers (in millions) | Network |
|---|
| September 1-September 7 | Canadian Idol 1 | 2.661 | CTV |
| September 8-September 14 | Canadian Idol 1 | 2.173 | CTV |
| September 15-September 21 | Survivor: Pearl Islands | 3.578 | Global |
| September 22-September 28 | CSI: Crime Scene Investigation | 2.699 | CTV |
| September 29-October 5 | Survivor: Pearl Islands | 3.204 | Global |
| October 6-October 12 | Survivor: Pearl Islands | 3.217 | Global |
| October 13-October 19 | Survivor: Pearl Islands | 3.013 | Global |
| October 20-October 26 | Survivor: Pearl Islands | 3.255 | Global |
| October 27-November 2 | Survivor: Pearl Islands | 3.133 | Global |
| November 3-November 9 | Survivor: Pearl Islands | 3.462 | Global |
| November 10-November 16 | Survivor: Pearl Islands | 3.480 | Global |
| November 17-November 23 | Survivor: Pearl Islands | 3.325 | Global |
| November 24-November 30 | Survivor: Pearl Islands | 3.021 | Global |
| December 1-December 7 | Survivor: Pearl Islands | 3.640 | Global |
| December 8-December 14 | Survivor: Pearl Islands | 3.836 | Global |
| December 15-December 21 | CSI: Miami | 2.467 | CTV |
| December 22-December 28 | CSI: Miami | 1.719 | CTV |
| December 29-January 4 | World Idol | 2.240 | CTV |
| January 5-January 11 | CSI: Crime Scene Investigation | 3.038 | CTV |
| January 12-January 18 | CSI: Crime Scene Investigation | 2.717 | CTV |
| January 19-January 25 | 61st Golden Globe Awards | 2.831 | CTV |
| January 26-February 1 | Survivor: All-Stars | 3.611 | Global |
| February 2-February 8 | Survivor: All-Stars | 4.008 | Global |
| February 9-February 15 | Survivor: All-Stars | 3.708 | Global |
| February 16-February 22 | Survivor: All-Stars | 3.772 | Global |
| February 23-February 29 | 76th Academy Awards | 5.674 | CTV |
| March 1-March 7 | Survivor: All-Stars | 3.810 | Global |
| March 8-March 14 | Survivor: All-Stars | 3.885 | Global |
| March 15-March 21 | Survivor: All-Stars | 3.332 | Global |
| March 22-March 28 | American Idol 3 | 2.787 | CTV |
| March 29-April 4 | Survivor: All-Stars | 3.827 | Global |
| April 5-April 11 | Survivor: All-Stars | 3.108 | Global |
| April 12-April 18 | 2004 Stanley Cup Playoffs | 3.653 | CBC |
| April 19-April 25 | 2004 Stanley Cup Playoffs | 4.000 | CBC |
| April 26-May 2 | Survivor: All-Stars | 3.226 | Global |
| May 3-May 9 | Friends | 5.159 | Global |
| May 10-May 16 | Survivor: All-Stars | 3.259 | Global |
| May 17-May 23 | CSI: Crime Scene Investigation | 2.959 | CTV |
| May 24-May 30 | 2004 Stanley Cup Playoffs | 3.333 | CBC |
| May 31-June 6 | 2004 Stanley Cup Playoffs | 5.215 | CBC |
| June 7-June 13 | 2004 Stanley Cup Playoffs | 5.202 | CBC |
| June 14-June 20 | Canadian Idol 2 | 2.076 | CTV |
| June 21-June 27 | Canadian Idol 2 | 1.910 | CTV |
| June 28-July 4 | Canadian Idol 2 | 1.666 | CTV |
| July 5-July 11 | Canadian Idol 2 | 2.135 | CTV |
| July 12-July 18 | CSI: Crime Scene Investigation | 1.963 | CTV |
| July 19-July 25 | The Amazing Race | 2.000 | CTV |
| July 26-August 1 | Canadian Idol 2 | 2.077 | CTV |
| August 2-August 8 | Canadian Idol 2 | 2.298 | CTV |
| August 9-August 15 | Canadian Idol 2 | 2.219 | CTV |
| August 16-August 22 | Canadian Idol 2 | 2.266 | CTV |
| August 23-August 29 | Canadian Idol 2 | 2.662 | CTV |
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