TONIGHT'S MUST-SEE

"NCAA Basketball Championships," 3 p.m., CBS. It's time to wrap up an amazing NCAA tournament. None of the final four teams — George Mason, Florida, UCLA and Louisiana State — had been expected to get that far. Tonight, the winners of Saturday's semifinals collide. No matter which team wins, it will be considered an upset champion.

"Fatal Desire," 6 p.m., Lifetime. Joe (Eric Roberts) is a quiet guy, a single dad who works in an Atlantic City, N.J., casino. He's a recovering alcoholic, needing a new spark. Tanya (Anne Heche) provides it. Their union, however, is doomed. The bad news is that this tale will seem way too familiar. It's a true story, but it echoes many old movie plots.

OF NOTE

"Prison Break," 7 p.m., Fox. Last week, Lincoln was strapped onto the electric chair before a call came from a judge. He postponed the execution for two weeks after receiving medical evidence about the murder victim. When the body was exhumed, however, the results did nothing to support Linc's case. So a breakout might still be needed.

"Two and a Half Men," 7 p.m., CBS. Martin Sheen guests on this show, which stars his son Charlie. "The New Adventures of Old Christine," 7:30 p.m., CBS. So far, things are going well between Christine (Julia Louis-Dreyfus) and the classy Burton (Matt Letscher). Now he wants to take things to the next level; she's doubtful.

"Everwood," 8 p.m., WB. As Jake struggles to recover from pill addiction, Nina feels helpless.

"24," 8 p.m., Fox. Jack scrambles to learn what secret Henderson (Peter Weller) has been so desperate to keep.