'How I Met Your Mother' (CBS)

Returns: 8 p.m. Monday, Jan. 11 The 100th episode of "HIMYM" features a musical number as Barney (Neil Patrick Harris) ponders giving up his beloved suits so he can get with a hot bartender (guest star Stacy Keibler) who prefers more casual clothes. Also: "Accidentally on Purpose," 8:30 p.m.; "Two and a Half Men," 9 p.m.; "The Big Bang Theory," 9:30 p.m.; "CSI: Miami," 10 p.m.
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