What to Watch on Thursday: Betty White appears on "30 Rock"

Community (8pm, NBC) - Annie hosts a Day of the Dead Party, which conflicts with Jeff's plans to court his statistics professor. Pierce (Chevy Chase) gets a little carried away as he confronts getting older.

30 Rock (9:30pm, NBC) -  Jack and Liz visit Kenneth's hometown looking for fresh talent (expect lots of over-the-top Southern stereotypes) and Tracy is afraid his will be the third death after two other celebrities die. Betty White and Jeff Dunham appear in guest roles.

Real Housewives of Atlanta (10pm, Bravo) - It's part one of two reunion shows featuring the feuding brats of Atlanta. The ridiculous fighting between NeNe and Kim is pretty unbearable at this point, so the only compelling reason to watch this is Kandi, who will talk about how she's dealing with the sudden tragic death of her former fiance, AJ (left).

Ace of Cakes (10pm, Food) - In the seventh season finale, the
gang goes to New York to prepare a cake for the premiere of "Harry
Potter and the Half-Blood Prince," and also a cake honoring an upcoming
"ghostgirl" novel.