Nielsen ratings

Prime-time viewership, in milions, compiled by Nielsen for the week ending Jan. 20.

1. AFC Championship: Baltimore vs. New England, CBS, 47.71M

2. "AFC Championship Post-Game," CBS, 25.95M

3. "NCIS," CBS, 22.86M

4. "American Idol" (Wednesday), Fox, 17.93M

5. "NCIS: Los Angeles," CBS, 17.64M