Main → Idol Database → Episodes → By season → Season 4 Episodes
| Episode # | Episode Title | Air Date | Rating 18-49 | Viewers |
|---|---|---|---|---|
| 1 | Washington D.C. Auditions | 01-18-2005 | 14 | 33.6 million |
| 2 | St. Louis Auditions | 01-19-2005 | 11.2 | 26.7 million |
| 3 | New Orleans Auditions | 01-25-2005 | 12.1 | 28.1 million |
| 4 | Las Vegas Auditions | 01-26-2005 | 11.2 | 26.6 million |
| 5 | Cleveland & Orlando Auditions | 02-01-2005 | 11.9 | 28.5 million |
| 6 | San Francisco Auditions | 02-02-2005 | 10.9 | 26.2 million |
| 7 | Hollywood Week: Part 1 | 02-08-2005 | 12 | 28.8 million |
| 8 | Hollywood Week: Part 2 | 02-09-2005 | 11.4 | 26.1 million |
| 9 | Hollywood Week: Part 3 | 02-15-2005 | 11.5 | 27.1 million |
| 10 | Hollywood Week: Part 4 | 02-16-2005 | 11.5 | 26.3 million |
| 11 | Top 12 Men Perform | 02-21-2005 | 9.9 | 23.5 million |
| 12 | Top 12 Women Perform | 02-22-2005 | 11.5 | 28.3 million |
| 13 | Top 24 Results | 02-23-2005 | 11.3 | 26.7 million |
| 14 | Top 10 Men Perform | 02-28-2005 | 10.1 | 23.6 million |
| 15 | Top 10 Women Perform | 03-01-2005 | 11 | 26.9 million |
| 16 | Top 20 Results | 03-02-2005 | 10.3 | 24.3 million |
| 17 | Top 8 Men Perform | 03-07-2005 | 10.1 | 23.9 million |
| 18 | Top 8 Women Perform | 03-08-2005 | 11.7 | 27.7 million |
| 19 | Top 16 Results | 03-09-2005 | 11.7 | 26.9 million |
| 20 | Top 12 Perform | 03-15-2005 | 11.5 | 28.4 million |
| 21 | Top 12 Results | 03-16-2005 | 10.8 | 24.7 million |
| 22 | Top 11 Perform | 03-22-2005 | 11.6 | 27.6 million |
| 23 | Top 11 Finalists Repeat Special | 03-23-2005 | 9 | 20.9 million |
| 24 | Top 11 Results | 03-24-2005 | 8.6 | 20.2 million |
| 25 | Top 10 Perform | 03-29-2005 | 11 | 26.4 million |
| 26 | Top 10 Results | 03-30-2005 | 10.6 | 24.9 million |
| 27 | Top 9 Perform | 04-05-2005 | 10 | 24.5 million |
| 28 | Top 9 Results | 04-06-2005 | 10.2 | 24.1 million |
| 29 | Top 8 Perform | 04-12-2005 | 10.7 | 25.6 million |
| 30 | Top 8 Results | 04-13-2005 | 10.8 | 25 million |
| 31 | Top 7 Perform | 04-19-2005 | 9.8 | 24.1 million |
| 32 | Top 7 Results | 04-20-2005 | 9.8 | 22.7 million |
| 33 | Top 6 Perform | 04-26-2005 | 10.8 | 25.5 million |
| 34 | Top 6 Results | 04-27-2005 | 10.5 | 24.4 million |
| 35 | Top 5 Perform | 05-03-2005 | 9.9 | 24.4 million |
| 36 | Top 5 Results | 05-04-2005 | 10.8 | 25.4 million |
| 37 | Top 4 Perform | 05-10-2005 | 10.2 | 24.7 million |
| 38 | Top 4 Results | 05-11-2005 | 11.5 | 26.6 million |
| 39 | Top 3 Perform | 05-17-2005 | 10.4 | 25 million |
| 40 | Top 3 Results | 05-18-2005 | 11.8 | 27.9 million |
| 41 | Special: The World's Worst Auditions | 05-19-2005 | 4 | ??? |
| 42 | Top 2 Perform | 05-24-2005 | 11.6 | 28.1 million |
| 43 | American Idol Season 4 Finale | 05-25-2005 | 12.5 | 30.3 million |