| Show # | Air Date | Tape Date | Season | Type | Contestants | Comments |
|---|---|---|---|---|---|---|
| 4595 | 2004-07-23 | 2004-03-17 | 20 | Regular | Kristine O'Connell-McCoy, Sarah Mulloy, Ken Jennings | Ken Jennings game 38.Ken sets a new single-day cash winnings record of $75,000.Last game of Season 20. |
| 4594 | 2004-07-22 | 2004-03-17 | 20 | Regular | Denele Hamada, Michael Jaeger, Ken Jennings | Ken Jennings game 37. |
| 4593 | 2004-07-21 | 2004-03-17 | 20 | Regular | Art Borgemenke, Liese Tamburrino, Ken Jennings | Ken Jennings game 36. |
| 4592 | 2004-07-20 | 2004-03-17 | 20 | Regular | Susan Keller, Christopher Mensel, Ken Jennings | Ken Jennings game 35.Ken surpasses Brad Rutter’s total of $1,155,102 to become the highest-earning player ever on the show. |
| 4591 | 2004-07-19 | 2004-03-17 | 20 | Regular | Tim Crockett, Beverly Herter, Ken Jennings | Ken Jennings game 34. |
| 4590 | 2004-07-16 | 2004-03-16 | 20 | Regular | Frank McNeil, Mary McCarthy, Ken Jennings | Ken Jennings game 33. |
| 4589 | 2004-07-15 | 2004-03-16 | 20 | Regular | Tom Vanderloo, Lou Ascatigno, Ken Jennings | Ken Jennings game 32. |
| 4588 | 2004-07-14 | 2004-03-16 | 20 | Regular | Darcy Smith, Greg Narver, Ken Jennings | Ken Jennings game 31. |
| 4587 | 2004-07-13 | 2004-03-16 | 20 | Regular | Max Corrick, Irene Lawrence, Ken Jennings | Ken Jennings game 30.Ken breaks the $1 million mark. |
| 4586 | 2004-07-12 | 2004-03-16 | 20 | Regular | Jennifer Lajewski, Rich Carroll, Ken Jennings | Ken Jennings game 29. |
| 4585 | 2004-07-09 | 2004-03-10 | 20 | Regular | Darcy Vernier, Kate Carlyle, Ken Jennings | Ken Jennings game 28. |
| 4584 | 2004-07-08 | 2004-03-10 | 20 | Regular | Leonard Koss, Oliver Mellet, Ken Jennings | Ken Jennings game 27. |
| 4583 | 2004-07-07 | 2004-03-10 | 20 | Regular | Vanessa Osborne, Michael Vance, Ken Jennings | Ken Jennings game 26.(Sarah: We'll go beyond the burrito to show you someMexican delicaciestoday onJeopardy!)(Sofia:¡Buen provecho!) |
| 4582 | 2004-07-06 | 2004-03-10 | 20 | Regular | Jenny Miller, Tom Aquino, Ken Jennings | Ken Jennings game 25. |
| 4581 | 2004-07-05 | 2004-03-10 | 20 | Regular | Nick Aretakis, Lucinda Sabino, Ken Jennings | Ken Jennings game 24. |
| 4580 | 2004-07-02 | 2004-03-09 | 20 | Regular | Mary Ann Eitler, Judy MacLeod Reardon, Ken Jennings | Ken Jennings game 23. |
| 4579 | 2004-07-01 | 2004-03-09 | 20 | Regular | Chris Mason, Vicki Reynolds, Ken Jennings | Ken Jennings game 22. |
| 4578 | 2004-06-30 | 2004-03-09 | 20 | Regular | Sue Richman, Ryan McClarren, Ken Jennings | Ken Jennings game 21. |
| 4577 | 2004-06-29 | 2004-03-09 | 20 | Regular | Laura Leslie, Alan Paul, Ken Jennings | Ken Jennings game 20. |
| 4576 | 2004-06-28 | 2004-03-09 | 20 | Regular | Lori Fountain, Michael Magdalena, Ken Jennings | Ken Jennings game 19. |
| 4575 | 2004-06-25 | 2004-03-03 | 20 | Regular | Michael Cudahy, Chris Edwards, Ken Jennings | Ken Jennings game 18. |
| 4574 | 2004-06-24 | 2004-03-03 | 20 | Regular | Miriam Bamberger, Bryan Givens, Ken Jennings | Ken Jennings game 17. |
| 4573 | 2004-06-23 | 2004-03-03 | 20 | Regular | Sarah Jane Woodall, Cathy Weber, Ken Jennings | Ken Jennings game 16.(Sarah: We're doing our best for Pan-American relations by bringing you clues fromsouth of the border, next onJeopardy!) |
| 4572 | 2004-06-22 | 2004-03-03 | 20 | Regular | Kelly Parker, Rick Faulkner, Ken Jennings | Ken Jennings game 15. |
| 4571 | 2004-06-21 | 2004-03-03 | 20 | Regular | Scheri Mullins, Matt Ottinger, Ken Jennings | Ken Jennings game 14. |
| 4570 | 2004-06-18 | 2004-03-02 | 20 | Regular | Ellen Cook, Bret Bradigan, Ken Jennings | Ken Jennings game 13. |
| 4569 | 2004-06-17 | 2004-03-02 | 20 | Regular | Deirdre Basile, Steve DiGiulio, Ken Jennings | Ken Jennings game 12. |
| 4568 | 2004-06-16 | 2004-03-02 | 20 | Regular | Josh Thorpe, Patricia Davis, Ken Jennings | Ken Jennings game 11. |
| 4567 | 2004-06-15 | 2004-03-02 | 20 | Regular | David Steinhardt, Karen Gasperino, Ken Jennings | Ken Jennings game 10. |
| 4566 | 2004-06-14 | 2004-03-02 | 20 | Regular | Joe Riley, Carla DenHartog, Ken Jennings | Ken Jennings game 9. |
| 4565 | 2004-06-11 | 2004-02-25 | 20 | Regular | Ethan Culbreth, Al Arsenault, Ken Jennings | Ken Jennings game 8.Ken breaks Tom Walsh's win streak record. |
| 4564 | 2004-06-10 | 2004-02-25 | 20 | Regular | Laura Adomunas, Susan Gress, Ken Jennings | Ken Jennings game 7.Ken runs four categories. |
| 4563 | 2004-06-09 | 2004-02-25 | 20 | Regular | Anne Fritz, Kevin Stanley, Ken Jennings | Ken Jennings game 6.(Jimmy: If you can't run away and join the circus, the next best thing is clues aboutCirque du Soleil--next onJeopardy!) |
| 4562 | 2004-06-08 | 2004-02-25 | 20 | Regular | Paula Filson, Corey Halgren, Ken Jennings | Ken Jennings game 5. |
| 4561 | 2004-06-07 | 2004-02-25 | 20 | Regular | Clinton Wieden, Josh Hornik, Ken Jennings | Ken Jennings game 4. |
| 4560 | 2004-06-04 | 2004-02-24 | 20 | Regular | Dane Petersen, Neil Thom, Ken Jennings | Ken Jennings game 3.(Jimmy: During the Depression, some people were very busy beavers building theHoover Dam. We'll tell you about it, coming up next onJeopardy!) |
| 4559 | 2004-06-03 | 2004-02-24 | 20 | Regular | Carrie Youngblood, Chad Kaihe, Ken Jennings | Ken Jennings game 2. |
| 4558 | 2004-06-02 | 2004-02-24 | 20 | Regular | Julia Lazarus, Ken Jennings, Jerry Harvey | Ken Jennings game 1. |
| 4557 | 2004-06-01 | 2004-02-24 | 20 | Regular | Sue McClung, Toby Guebert, Jerry Harvey | |
| 4556 | 2004-05-31 | 2004-02-24 | 20 | Regular | Jerry Harvey, Patti Gregg, Anne Boyd | Anne Boyd game 5. |
| 4555 | 2004-05-28 | 2004-02-11 | 20 | Regular | Philip Blustein, Jen Jorczak, Anne Boyd | Anne Boyd game 4. |
| 4554 | 2004-05-27 | 2004-02-11 | 20 | Regular | Andy Yermack, M'Liss Moore, Anne Boyd | Anne Boyd game 3. |
| 4553 | 2004-05-26 | 2004-02-11 | 20 | Regular | Martha Fingleton, Larry Hamberlin, Anne Boyd | Anne Boyd game 2. |
| 4552 | 2004-05-25 | 2004-02-11 | 20 | Regular | Anne Boyd, Glenn Fechner, Jeremy Schanck | Anne Boyd game 1. |
| 4551 | 2004-05-24 | 2004-02-11 | 20 | Regular | Gina George, Daniel Morgan, Jeremy Schanck | |
| 4550 | 2004-05-21 | 2004-02-10 | 20 | Regular | Juan Carlos Batlle, Jeremy Schanck, Paul Nethercut | |
| 4549 | 2004-05-20 | 2004-02-10 | 20 | Regular | Robert Furtney, Paul Nethercut, Kristina Alexander | |
| 4548 | 2004-05-19 | 2004-02-10 | 20 | Regular | Kristina Alexander, Tim MacGowan, Al Davis | |
| 4547 | 2004-05-18 | 2004-02-10 | 20 | Regular | Suzanne LaVere, Matt Cookson, Al Davis | |
| 4546 | 2004-05-17 | 2004-02-10 | 20 | Regular | Bill Kinnaird, Laura Paquet, Al Davis |