Most recent episodes:
Total Viewers:
1. The Vampire Diaries - 3.6m
2. Nikita - 3.1m
3. Smallville - 3.0m
4. Supernatural - 2.9m
5. America's Next Top Model - 2.8m
6. Hellcats - 2.3m
7. 90210 - 2.0m
8. One Tree Hill - 1.8m
9. Gossip Girl - 1.8m
10. Life Unexpected - 1.5m
However, The CW doesn't really care about those numbers. They do care about women 18-34 and adults 18-34.
Women 18-34:
1. The Vampire Diaries - 2.7
2. Gossip Girl - 2.1
2. America's Next Top Model - 2.1
4. 90210 - 1.9
5. Hellcats - 1.7
6. One Tree Hill - 1.6
7. Supernatural - 1.3
8. Nikita - 1.1
8. Life Unexpected - 1.1
10. Smallville - 1.0
Adults 18-34:
1. The Vampire Diaries - 1.9
2. America's Next Top Model - 1.4
2. Supernatural - 1.4
4. Gossip Girl - 1.3
4. 90210 - 1.3
4. Smallville - 1.3
7. Hellcats - 1.2
7. Nikita - 1.2
9. One Tree Hill - 1.1
10. Life Unexpected - 0.8
I think those numbers paint a slightly more optimistic picture. Obviously 90120 needs to avoid losing too much of its audience because that has been the problem recently - the premiere was down about 30% from last year.