| Show | Season | Lo | Avg | Hi | Grade | |
| American Idol (perf) | 10 | 6.4 | 7.82 | 9.7 | A- | |
| American Idol (results) | 10 | 5.7 | 7.10 | 9.2 | A- | |
| Dancing with the Stars (perf) | 12 | spring | 4.0 | 4.65 | 5.3 | A |
| Two and a Half Men | 11 | 4.2 | 4.49 | 4.9 | B- | |
| Dancing with the Stars (perf) | 11 | fall | 4.0 | 4.33 | 5.1 | A- |
| Grey's Anatomy | 7 | 3.2 | 4.10 | 5.4 | C+ | |
| The Big Bang Theory | 4 | 3.2 | 4.00 | 4.9 | ||
| NCIS | 8 | 3.5 | 3.99 | 4.6 | B | |
| Dancing with the Stars (results) | 11 | fall | 3.1 | 3.78 | 5.3 | A- |
| The Office | 7 | 3.2 | 3.74 | 4.4 | B- | |
| Survivor | 21 | fall | 3.2 | 3.68 | 4.1 | B+ |
| Dancing with the Stars (results) | 12 | spring | 3.0 | 3.63 | 4.6 | A |
| House | 7 | 2.9 | 3.58 | 4.7 | B- | |
| Family Guy | 10 | 3.0 | 3.57 | 4.7 | B- | |
| America's Got Talent (Tue) | 6 | summer | 2.8 | 3.48 | 4.6 | A- |
| Desperate Housewives | 7 | 2.7 | 3.46 | 4.4 | C- | |
| Criminal Minds | 6 | 3.1 | 3.46 | 4.0 | B- | |
| How I Met Your Mother | 6 | 2.5 | 3.39 | 3.9 | B | |
| The Amazing Race | 17 | fall | 2.6 | 3.32 | 3.8 | B |
| Survivor | 22 | spring | 3.1 | 3.28 | 4.0 | B- |
| The Bachelor | 15 | winter | 2.7 | 3.26 | 4.7 | C |
| The Simpsons | 22 | 2.3 | 3.21 | 5.7 | B | |
| America's Got Talent (Wed) | 6 | summer | 2.5 | 3.17 | 4.1 | A- |
| Bones | 6 | 2.2 | 2.99 | 3.9 | B- | |
| CSI | 11 | 2.3 | 2.96 | 3.4 | C+ | |
| Rules of Engagement | 5 | 2.2 | 2.88 | 3.4 | C+ | |
| The Biggest Loser | 11 | spring | 2.3 | 2.84 | 3.3 | D+ |
| The Celebrity Apprentice | 11 | spring | 2.4 | 2.82 | 3.1 | B+ |
| Big Brother (Wed) | 13 | summer | 2.4 | 2.80 | 3.3 | A- |
| Hell's Kitchen | 8 | fall | 2.2 | 2.77 | 3.4 | |
| The Biggest Loser | 10 | fall | 2.3 | 2.73 | 4.0 | D+ |
| Big Brother (Sun) | 13 | summer | 2.4 | 2.71 | 3.2 | A- |
| Private Practice | 4 | 1.9 | 2.67 | 3.9 | ||
| Big Brother (Thu) | 13 | summer | 2.3 | 2.67 | 3.1 | A- |
| The Amazing Race | 18 | spring | 2.1 | 2.64 | 3.2 | D+ |
| Hell's Kitchen | 9 | summer | 2.4 | 2.64 | 2.9 | B- |
| Law & Order: SVU | 12 | 2.0 | 2.58 | 3.2 | B+ | |
| The Bachelorette | 7 | summer | 1.7 | 2.44 | 2.8 | D+ |
| CSI: Miami | 9 | 1.8 | 2.42 | 3.2 | D | |
| Wipeout | 4 | wint/spr | 1.4 | 2.29 | 3.8 | |
| 30 Rock | 5 | 1.7 | 2.27 | 3.1 | C+ | |
| Extreme Makeover: Home Edition | 8 | 1.5 | 2.26 | 2.7 | C- | |
| American Dad! | 7 | 1.6 | 2.25 | 3.1 | C | |
| Brothers & Sisters | 5 | 1.6 | 2.21 | 3.0 | D | |
| So You Think You Can Dance (Wed) | 8 | summer | 1.8 | 2.26 | 3.1 | C |
| The Game | 4 | BET | 1.7 | 2.20 | 3.6 | |
| So You Think You Can Dance (Thu) | 8 | summer | 1.6 | 2.18 | 3.3 | C |
| Wipeout | 4 | summer | 1.4 | 1.94 | 2.4 | D |
| CSI: NY | 7 | Friday | 1.6 | 1.75 | 2.0 | D+ |
| Chuck | 4 | 1.3 | 1.73 | 2.1 | ||
| Kitchen Nightmares | 4 | Friday | 1.3 | 1.62 | 1.9 | |
| Medium | 10 | Friday | 1.1 | 1.36 | 1.6 | D+ |
| The Apprentice | 10 | fall | 0.9 | 1.34 | 1.6 | F |
| America's Next Top Model | 15 | fall | 1.1 | 1.30 | 1.5 | C+ |
| Flashpoint | 4 | Friday, summer | 0.8 | 1.10 | 1.3 | |
| Supernanny | 10 | Friday | 0.9 | 1.09 | 1.3 | C |
| Smallville | 7 | Friday | 0.8 | 1.07 | 1.3 | B+ |
| Law & Order: CI | 10 | USA | 0.9 | 1.04 | 1.4 | B+ |
| Supernatural | 6 | Friday | 0.8 | 0.99 | 1.3 | B |
| America's Next Top Model | 16 | 0.9 | 0.98 | 1.1 | D- | |
| One Tree Hill | 8 | 0.8 | 0.86 | 1.2 | D+ | |
| Gossip Girl | 4 | 0.6 | 0.86 | 1.1 | ||
| Friday Night Lights | 5 | Friday, summer | 0.6 | 0.80 | 0.9 | D- |
This is not nearly a comprehensive list of shows; it only includes those shows covered in my War of 18-49 series.
Shows that air on Friday or during the summer are so denoted because of the inherent viewing level disadvantages at those times. The only shows denoted with other parts of the year are those that air multiple seasons within one broadcast year.
"Season" is the season number for the show. "Lo" and "Hi" are the lowest and highest original adults 18-49 ratings for that show in that season. "Avg" is the average of all Live + SD adults 18-49 original results, weighted for length (though I don't weight in extra or missing minutes due to very short overruns). Those numbers with only one digit after the decimal are less accurate due to substantial missing and/or preliminary information. For more about the incompleteness of my info in any individual case, see the individual show page.
Starting with the 2010-11 season, "Grade" is how I rate a season of ratings within the context of the show's ratings history. The links are to War of 18-49 Update posts where I explain the grade in more detail.
Previous Year (2009-10) | 2010-11
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