On TV Tonight: Monday December 17, 2012

NET 8PM 8:30PM 9PM 9:30PM 10PM 10:30PM
ABC Extreme Makeover: Home Edition Castle (R)
CBS How I Met Your Mother How I Met Your Mother 2 Broke Girls Mike & Molly Hawaii Five-0
CW Gossip Girl (Series Finale)
FOX Dragons: Gift of the Night Fury Ice Age: A Mammoth Christmas Special Happiness Is a Warm Blanket, Charlie Brown
NBC The Voice 1600 Penn Take It All
MISC Cake Boss: Next Great Beaker (TLC)
Picture Perfect (HBO)
Pawn Stars (History)

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