Debuts
| Date | Debut |
|---|---|
| January 7 | The Apprentice on NBC |
| January 11 | Drake & Josh on Nickelodeon |
| January 17 | Astro Boy on The WB |
| January 18 | The L Word on Showtime |
| February 14 | Power Rangers Dino Thunder on ABC |
| February 15 | Extreme Makeover: Home Edition on ABC |
| March 4 | Pimp My Ride on MTV |
| March 21 | Deadwood on HBO |
| April 3 | Danny Phantom on Nickelodeon |
| May 1 | Megas XLR on Cartoon Network |
| June 1 | Summerland The WB |
| June 4 | TNA iMPACT! on Fox Sports Net |
| June 16 | Quintuplets on Fox |
| June 19 | Winx Club on Fox |
| July 16 | Stargate Atlantis on Sci-Fi Channel |
| July 18 | Entourage on HBO |
| July 21 | Rescue Me on FX |
| July 29 | Blue Collar TV on The WB |
| August 2 | Blue's Room on Nickelodeon |
| August 13 | Foster's Home for Imaginary Friends on Cartoon Network |
| August 31 | Father of the Pride on NBC |
| September 9 | Joey on NBC |
| September 11 | The Batman on The WB |
| Da Boom Crew on The WB | |
| September 12 | Jack & Bobby on The WB |
| Ned's Declassified School Survival Guide on Nickelodeon | |
| Unfabulous on Nickelodeon | |
| September 18 | F-Zero: GP Legend on Fox |
| One Piece on Fox | |
| September 20 | Second Time Around on UPN |
| September 22 | CSI: NY on CBS |
| Lost on ABC | |
| Veronica Mars on UPN | |
| October 3 | Desperate Housewives on ABC |
| Boston Legal premieres on ABC | |
| October 10 | The Backyardigans on Nickelodeon |
| October 11 | Maya & Miguel on PBS |
| Postcards From Buster on PBS | |
| October 27 | Drawn Together on Comedy Central |
| November 5 | Cartoon Alley on TCM |
| November 6 | Fullmetal Alchemist on Cartoon Network's Adult Swim programming block |
| Ghost in the Shell: Stand Alone Complex on Cartoon Network's Adult Swim programming block | |
| November 16 | House on Fox |
| November 19 | Hi Hi Puffy AmiYumi on Cartoon Network |
Read more about this topic: 2004 In American Television