“American Idol” (7 p.m., Fox): As if “American Idol” needed to expand its

“American Idol” (7 p.m., Fox): As if “American Idol” needed to expand its audience. The talent-show juggernaut should pull big ratings for this special one-time airing after an NFL playoff game. Now, if we can just throw some penalty flags at some of the deluded hopefuls.

“Once Upon a Time” (8 p.m., ABC): Poor Snow White, um, Mary Margaret (Ginnifer Goodwin). She’s nursing a broken heart on “Once Upon a Time” as her Prince Charming (Josh Dallas) prepares to marry another woman. Funny, we can’t recall that part in our storybooks.

“Desperate Housewives” (8 p.m., ABC): “Desperate Housewives” continues the march toward its series finale with an episode that has Lynette (Felicity Huffman) venturing out on her first date since she and Tom (Doug Savant) separated. We’re thinking that it will rank pretty high on the awkward meter.

TV listings: B8

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