Tuesday, July 24, 2013 ratings — New episodes: Perfect Score, Whose Line is it Anyway?, America’s Got Talent, Extreme Weight Loss, and So You Think You Can Dance. Special: 20/20: The Royal Baby. Episode reruns: NCIS, NCIS: Los Angeles, Person of Interest, and Hollywood Game Night.

ABC
8pm – Extreme Weight Loss: 1.1 in the demo with 3.72 million.
10pm – 20/20: The Royal Baby: Heir the the Throne: (special) 0.9 in the demo with 4.24 million.

CBS
8pm – NCIS: (rerun) 0.9 in the demo with 7.08 million.
9pm – NCIS: Los Angeles: (rerun) 0.8 in the demo with 5.78 million.
10pm – Person of Interest: (rerun) 0.8 in the demo with 5.08 million.

The CW:
8pm – Whose Line Is It Anyway?: 0.9 in the demo with 2.42 million.
8:30pm – Whose Line Is It Anyway?: 0.8 in the demo with 2.10 million.
9pm – Perfect Score: 0.3 in the demo with 0.95 million.
9:30pm – Perfect Score: 0.3 in the demo with 0.78 million.

FOX
8pm – So You Think You Can Dance: 1.4 in the demo with 4.10 million.

NBC
8pm – Hollywood Game Night: (rerun) 1.0 in the demo with 3.40 million.
9pm – America’s Got Talent: 2.8 in the demo with 10.18 million.

Above are the fast affiliate ratings. The “demo” refers to the viewers in the 18-49 demographic. The percentages represent the change since the previous original episode. (Percentages aren’t given for reruns or specials.) “Million” refers to the total number of viewers.

To see past ratings for a particular show, click the show’s link. The show pages are updated with the daily final ratings when they become available. Those pages include percentage changes in both the demo and total viewership, in addition to season averages to date.

Here are the show season averages, grouped by network: ABC | CBS | CW | FOX | NBC

What were you watching last night? Original new episodes, reruns, or something better?