TONIGHT'S MUST-SEE

"Lost," 8 p.m., ABC. This is what ABC refers to euphemistically as the fall-season finale. That means the network plans to put another show ("Day Break") in this time slot for a 13-episode run, beginning with next week's two-hour opener. Skipping reruns, "Lost" will return in February. During the three-month lull, fans will have a lot to ponder. Last week, the delirious Mr. Eko wandered through fantasies, then apparently met a real monster after refusing to confess his sins. He was attacked and killed. Tonight, much of the action centers on the captives. Jack must decide whether to perform surgery on the leader of the Others. Kate fears that Pickett will kill Sawyer.

"Jericho," 7 p.m., CBS. The oft-feuding Green brothers (Skeet Ulrich and Kenneth Mitchell) must work together now. Their dad (Gerald McRaney) is near death. They must go to the city and get some potent antibiotics — possibly by force. That leads to a shoot-out and to a disturbing view of the post-disaster world beyond Jericho.

OF NOTE

"Bones," 7 p.m., Fox. When two bodies are found near Las Vegas, Booth and Brennan are sent to Nevada. That's tough on Booth who has a gambling problem.

"30 Rock," 7 p.m., NBC. Liz (Tina Fey) has to worry about Jack (Alec Baldwin) being sort of her life coach after she admits she returned to her boyfriend out of boredom. At work, she frets about changing appearance: Tracy has a face tattoo, Jenna has had Botox and collagen injections — and Josh, alas, has received two black eyes after a fight with Regis Philbin.

"Twenty Good Years," 7:30 p.m., NBC. The newly adventurous John insists he's going to hunt his Thanksgiving dinner.

"Criminal Minds," 8 p.m., CBS. The world seems to be full of stories in which robots take control of humans. Tonight, someone influenced by such a novel appears to be bombing high-tech places.

"Secrets of the Dead: Dogfight Over Guadalcanal," 8 p.m., PBS. In 1942 there was a dramatic dogfight between two ace fighter pilots. The men — American and Japanese — were injured but survived. Using their memoirs (which are sometimes contradictory) and an examination of the site, events are re-created.

"Warplane," 9 p.m., PBS, concluding next week. Cool and distant, this documentary miniseries views the history of planes in warfare. Tonight's first hour follows the development of planes and their World War I use for surveillance and for spotting the results of ground artillery, plus occasional bombing. The second hour views the World War II emergence of massive bombing.

"CSI: NY," 9 p.m., CBS. A paintball player is killed after entering a warehouse filled with Thanksgiving parade balloons.