TONIGHT'S MUST-SEE

"Fallen," 8 p.m., ABC Family. It's surprising that TV characters even bother with birthdays anymore. They often come with nasty surprises. In one show this fall (Fox's "Reaper"), a guy will learn on his 21st birthday that his parents sold his soul to Satan. They're really sorry about it. And tonight, Aaron Corbett (Paul Wesley) learns on his 18th birthday that he's a Nephilim — half angel, but with the soul of a man. He also learns that he is The Redeemer. This information comes from a scruffy-looking vagabond (Tom Skerritt) and from a powerful force (Rick Worthy). It comes as others are trying to kill him. Tonight's film debuted a year ago, as a one-shot movie. It starts as a fairly good teen-angst drama, then becomes a whiz-bang, special-effects action story. Now ABC Family has expanded it into a three-night, six-hour miniseries. The original film reruns tonight, with the new ones airing 8 to 10 p.m. tomorrow and Sunday.

"Broken Trail," 5 p.m., AMC. When Emmy nominations arrived recently, this film had scored big. It earned noms for best miniseries in the movies-or-miniseries category, best director, writer, actor, supporting actor, supporting actress and more — 16 in all. "Broken Trail" isn't a great film; but it is a good one, with a solid core. Robert Duvall plays an honest old cowboy, linking with a younger man (Thomas Haden Church) on a cross-country drive of horses. Along the way, their basic decency is put to the test. Directed by Walter Hill ("The Long Riders," "48 Hrs."), this is in the tradition of sweeping western sagas.

OF NOTE

"Sands of Oblivion," 4 p.m., Sci Fi Channel. This semi-goofy film debuted Saturday and is reasonably entertaining. Morena Baccarin — the Brazilian beauty in "Firefly," "Serenity" and the current "Heartland" — plays an archaeologist, digging up the old movie sets of "The Ten Commandments." It turns out that director Cecil B. DeMille used authentic artifacts; they are, of course, cursed, leading to nasty moments.

"Sharks: A Family Affair," 6 p.m., Discovery. This new documentary follows a family as it spends a week off Dyer Island in South Africa, watching and tagging sharks. Craig Ferreira, a shark expert, is there with his wife Jytte and their children, Storm, Cruise and Wilder.

"The Forgotten" (2004), 7 p.m., Fox. A woman (Julianne Moore) has been grieving her son for more than a year. Then she's told he never existed; that propels a search for the truth.

"Ghost Whisperer," 7 p.m., CBS. In a rerun, the ghost of a street racer feels his fiancee caused his death. He's not happy about it and wants to do the same to her.

"Jericho," 8 p.m., CBS. This rerun finds the town of Jericho in crisis. April has gone into early labor and needs surgery; meanwhile, the people of New Bern are driving a tough bargain.

"Monk," 9 p.m., USA Network. Monk considers Captain Stottlemeyer's new girlfriend (played by Sharon Lawrence) a murder suspect. The captain disagrees.

"Numb3rs," 9 p.m., CBS. Charlie needs his math skills to determine why a private jet crashed.