| Show # | Air Date | Tape Date | Season | Type | Contestants | Comments |
|---|---|---|---|---|---|---|
| 4624 | 2004-10-14 | 2004-08-10 | 21 | Regular | K.C. Backer, Graham House, Ken Jennings | Ken Jennings game 57.(Tie Domi: Hi, I'm Tie Domi of the Toronto Maple Leafs. WatchJeopardy!or you're gonna have todrop the gloveswith me.)(Alex: Come on. You want a piece of this, huh?) |
| 4623 | 2004-10-13 | 2004-08-10 | 21 | Regular | Larry Bellinger, Marielle Poss, Ken Jennings | Ken Jennings game 56. |
| 4622 | 2004-10-12 | 2004-08-10 | 21 | Regular | Marcy Palino, Matt Kleinmaier, Ken Jennings | Ken Jennings game 55.(Jimmy: Howdy! Come along and sing somecowboy songs, next onJeopardy!Come on, let's go!) |
| 4621 | 2004-10-11 | 2004-08-10 | 21 | Regular | Tristan Mabry, Sunny Schomaker, Ken Jennings | Ken Jennings game 54.(Cheryl: Go to outer space without leaving your couch. Clues from Chicago'sAdler Planetarium, next onJeopardy!) |
| 4620 | 2004-10-08 | 2004-08-09 | 21 | Regular | Al Lindke, Aimee Watson, Ken Jennings | Ken Jennings game 53. |
| 4619 | 2004-10-07 | 2004-08-09 | 21 | Regular | Jennifer Lord, Steve Kornya, Ken Jennings | Ken Jennings game 52. |
| 4618 | 2004-10-06 | 2004-08-09 | 21 | Regular | Bill Carter, Kathryn Dorminey, Ken Jennings | Ken Jennings game 51. |
| 4617 | 2004-10-05 | 2004-08-09 | 21 | Regular | Jay Wolman, Pat Greene, Ken Jennings | Ken Jennings game 50. |
| 4616 | 2004-10-04 | 2004-08-09 | 21 | Regular | Beth Salkind, Jeff Suchard, Ken Jennings | Ken Jennings game 49.First regular play game of Season 21 to be recorded after the summer hiatus. |
| 4605 | 2004-09-17 | 2004-04-23 | 21 | Regular | Greg Taylor, Marilyn Werner, Ken Jennings | Ken Jennings game 48. |
| 4604 | 2004-09-16 | 2004-04-23 | 21 | Regular | Elaine Skopelja, John Cook, Ken Jennings | Ken Jennings game 47. |
| 4603 | 2004-09-15 | 2004-04-23 | 21 | Regular | David Fishbach, Cara Butler, Ken Jennings | Ken Jennings game 46. |
| 4602 | 2004-09-14 | 2004-04-23 | 21 | Regular | Robert Quinn, Kate Duffy, Ken Jennings | Ken Jennings game 45. |
| 4601 | 2004-09-13 | 2004-04-23 | 21 | Regular | Bruce England, Dana Dolan, Ken Jennings | Ken Jennings game 44. |
| 4600 | 2004-09-10 | 2004-04-22 | 21 | Regular | Bill Scheller, Kollin Min, Ken Jennings | Ken Jennings game 43. |
| 4599 | 2004-09-09 | 2004-04-22 | 21 | Regular | Todd Perkins, Amy Helmes, Ken Jennings | Ken Jennings game 42. |
| 4598 | 2004-09-08 | 2004-04-22 | 21 | Regular | Laura Gustafson, Adam Meyer, Ken Jennings | Ken Jennings game 41. |
| 4597 | 2004-09-07 | 2004-04-22 | 21 | Regular | Rich Hartz, Bob Watts, Ken Jennings | Ken Jennings game 40. |
| 4596 | 2004-09-06 | 2004-04-22 | 21 | Regular | J.D. Smith, Betsey Casman, Ken Jennings | Ken Jennings game 39.First game of Season 21. New title graphics. |