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“Community” (8 p.m., NBC). Oh, why not? It’s been on a pretty good roll of late. Tonight it’s Troy’s 21st birthday, so the gang goes to a bar, Jeff and Britta get goofy, Annie takes on a made-up personality to match her fake ID, and Senor Chang tries to crash the party. Good potential for laughs there.

“30 Rock” (8:30 p.m., NBC). Liz’s relationship is on the rocks, so she — for some reason — turns to Kenneth for advice.

“Fringe” (9 p.m., Fox). OK, things are reaching a crescendo: Olivia is fully aware she’s trapped in another universe and now Peter knows he’s sleeping with the alternate Olivia. I see some cross-universe travel coming up. This should be awesome, and the trailer makes me giddy.

“It’s Always Sunny in Philadelphia” (10 p.m., FX). Dennis and Charlie hitchhike and almost get raped by Tom Sizemore. And Mac’s man-crush, Chase Utley of the not-world-champion Philadelphia Phillies, guest-stars too.

“The League” (10:30 p.m., FX). The pressure’s rising as the playoffs approach. Andre’s diet makes him emotional, and Ruxin looks to the guys to back him up when he lies to his wife.

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“The Office” (9 p.m., NBC). Michael tries to stem China’s global influence, and Dwight cracks down on the building’s standards.

“Burn Notice” (10 p.m., USA). Michael’s brother Nate is back, and this time he’s trying to find a stolen car full of drugs. Meanwhile, Sam and Jesse head to the Dominican Republic to stop the sale of sensitive documents.

“Brad Meltzer’s Decoded” (10 p.m., History). Series premiere. The novelist hosts a new show about secret symbols, codes and conspiracies. All very “Da Vinci Code”-ish. Tonight he investigates a White House cornerstone laid by, wait for it . . . . Freemasons!

Skip it

“The Apprentice” (10 p.m., NBC). It’s Part 1 of the season finale. Geez, I forgot this was still on.