Suvivor: South Pacific (8pm, CBS) - Members of the jury interview the final three castaways before voting for the winner. This takes two hours. The winner is announced in the "Survivor Reunion" show at 10pm.
Downton Abbey (8pm, UNC-TV) - UNC-TV begins repeats of one of the best TV shows of the year tonight. If you missed it earlier, set your DVRs right now. Tonight we get the first two episodes of this 4-episode series, which follows the entailment woes of Lord Grantham (Hugh Bonneville, right), his wife (Elizabeth McGovern, right), their three daughters, and his mother (Maggie Smith). It's way better than I've made it sound here. Just trust me on this one. (Note: episode 3 will air on Dec. 25 and episode 4 will air on Jan. 1. Season 2 begins on Jan. 8.)
Allen Gregory (8:30pm, Fox) - In the series finale, Allen woos Principal Gottlieb with bribery. No second season for this stinker.
Dexter (9pm, Showtime) - In the sixth season finale, Dexter (Michael C. Hall) and the Homicide department try to stop the Doomsday Killers from committing one final murder, while Debra deals with a new emotional situation.
The Santa Clause 3: The Escape Clause (9pm, ABC) - A vindictive Jack Frost (Martin Short) wreaks havoc at the North pole for Santa (Tim Allen) in the third installment in the "Santa Clause" franchise.
Homeland (10pm, Showtime) - In the Season 1 finale, a near catatonic Carrie (Claire Danes) is confined to bed as Saul (Mandy Patinkin) puzzles over the unnerving implications of her timeline. Meanwhile, Walker settles on a perch from which to complete his mission, and Brody (Damien Lewis) preps for the vice president's policy summit. Great first season -- so glad it's coming back for a second.
On the Case with Paula Zahn (10pm, Investigation Discovery) - A look at the 2008 murder of Lucy Johnson in Gastonia. The pregnant mother of two was found shot twice in the head in her burning home, and her family and friends pointed police to several possible suspects. The 31-year-old ER nurse was twice divorced and embroiled in a custody battle with an ex-boyfriend. But as the investigation unfolded, police stunned everyone by zeroing in on the most unlikely of targets.
All-American Muslim (10pm, TLC) - Lowe's may not like it, but series goes on. Tonight, the end of the month of Ramadan means Coach Zaban's team is no longer fasting, but their playoff hopes may also be over if they don't win their next game.