| 1. Auditions: Washington DC |
S04E01 / Air Date: 18 January 2005 |
| 2. Auditions: St. Louis |
S04E02 / Air Date: 19 January 2005 |
| 3. Auditions: New Orleans |
S04E03 / Air Date: 25 January 2005 |
| 4. Auditions: Las Vegas |
S04E04 / Air Date: 26 January 2005 |
| 5. Auditions: Cleveland & Orlando |
S04E05 / Air Date: 01 February 2005 |
| 6. Auditions: San Francisco |
S04E06 / Air Date: 02 February 2005 |
| 7. Hollywood Rounds: Part 1 |
S04E07 / Air Date: 08 February 2005 |
| 8. Hollywood Rounds: Part 2 |
S04E08 / Air Date: 09 February 2005 |
| 9. Hollywood Rounds: Part 3 |
S04E09 / Air Date: 15 February 2005 |
| 10. Hollywood Rounds: Part 4 |
S04E10 / Air Date: 16 February 2005 |
| 11. Top 24 Performance Show: Part 1 (Guys) |
S04E11 / Air Date: 21 February 2005 |
| 12. Top 24 Performance Show: Part 2 (Girls) |
S04E12 / Air Date: 22 February 2005 |
| 13. Top 24 Results Show |
S04E13 / Air Date: 23 February 2005 |
| 14. Top 20 Performance Show: Part 1 (Guys) |
S04E14 / Air Date: 28 February 2005 |
| 15. Top 20 Performance Show: Part 2 (Girls) |
S04E15 / Air Date: 01 March 2005 |
| 16. Top 20 Results Show |
S04E16 / Air Date: 02 March 2005 |
| 17. Top 16 Performance Show: Guys |
S04E17 / Air Date: 07 March 2005 |
| 18. Top 16 Performance Show: Girls |
S04E18 / Air Date: 08 March 2005 |
| 19. Top 12 Revealed |
S04E19 / Air Date: 09 March 2005 |
| 20. Top 12 Perform |
S04E20 / Air Date: 15 March 2005 |
| 21. One Must Go Home Tonight! |
S04E21 / Air Date: 16 March 2005 |
| 22. Top 11 Perform |
S04E22 / Air Date: 22 March 2005 |
| 23. Top 11 Return |
S04E23 / Air Date: 23 March 2005 |
| 24. It's Down to the Top 10 |
S04E24 / Air Date: 24 March 2005 |
| 25. Top 10 Perform |
S04E25 / Air Date: 29 March 2005 |
| 26. It's Down to the Top 9 |
S04E26 / Air Date: 30 March 2005 |
| 27. American Idol's Top 9 Perform |
S04E27 / Air Date: 06 April 2005 |
| Season 4 Episode 28 |
S04E28 |
| 29. Top 8 Perform: Songs from the Year You Were Born |
S04E29 / Air Date: 12 April 2005 |
| 30. Who Is Eliminated from the Top 8 |
S04E30 / Air Date: 19 April 2005 |
| 31. Top 7 Perform |
S04E31 / Air Date: 20 April 2005 |
| 32. Who's Out of the Top 7 |
S04E32 / Air Date: 26 April 2005 |
| 33. Top 6 Perform |
S04E33 / Air Date: 27 April 2005 |
| 34. Who Is Eliminated from the Top 6 |
S04E34 / Air Date: 03 May 2005 |
| 35. Top 5 Perform |
S04E35 / Air Date: 04 May 2005 |
| 36. Find Out Who's Been Eliminated from the Top 5 |
S04E36 / Air Date: 10 May 2005 |
| 37. American Idol's Final 4 Perform! |
S04E37 / Air Date: 11 May 2005 |
| 38. Find Out Who's Been Eliminated from the Final 4 |
S04E38 / Air Date: 17 May 2005 |
| 39. American Idol's Final 3 Perform |
S04E39 / Air Date: 18 May 2005 |
| 40. Tonight Is the Night When 3 Become 2 |
S04E40 / Air Date: 24 May 2005 |
