Monday, December 17, 2012 ratings — New episodes: The Voice, How I Met Your Mother, 2 Broke Girls, Mike & Molly, Hawaii Five-0, Take It All, 1600 Penn, and the series finale of Gossip Girl. Specials: Gossip Girl Retrospective, Extreme Makeover: Home Edition, Dreamworks Dragons: Gift Of The Night Fury, Ice Age: A Mammoth Christmas, and Happiness Is A Warm Blanket Charlie Brown. Episode repeats: Castle.

Below 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.) “Millions” 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.

ABC
8pm – Extreme Makeover: Home Edition: 1.0 rating with 4.2 million.
9pm – Extreme Makeover: Home Edition: 1.2 rating with 4.9 million.
10pm – Castle: (repeat) 1.1 rating with 5.4 million.

CBS
8pm – How I Met Your Mother: 3.4 in the demo (+6% change) with 8.7 million.
9pm – 2 Broke Girls: 3.5 in the demo (-8% change) with 10.2 million.
9:30pm – Mike & Molly: 3.3 in the demo (+6% change) with 10.8 million.
10pm – Hawaii Five-0: 2.4 in the demo (-4% change) with 10.3 million.

The CW:
8pm – Gossip Girl: (retrospective) 0.6 rating with 1.3 million.
9pm – Gossip Girl: (series finale) 0.8 in the demo (+33% change) with 1.5 million.

FOX
8pm – Dreamworks Dragons: Gift of the Night Fury: (special) 1.5 in the demo with 3.9 million.
8:30pm – Ice Age: A Mammoth Christmas: (special, repeat) 1.5 in the demo with 3.9 million.
9pm – Happiness is a Warm Blanket, Charlie Brown: (special, repeat) 0.9 in the demo with 2.7 million.

NBC
8pm – The Voice: 4.1 in the demo (+8% change) with 13.2 million.
9:30pm – 1600 Penn: 2.3 in the demo with 7.2 million.
10pm – Take It All: 1.5 in the demo (+36% change) with 4.5 million.

What were you watching last night? Do you hope that Extreme Makeover: Home Edition returns? Did you tune in for the series finale of Gossip Girl or the debut of 1600 Penn?