TONIGHT'S MUST-SEE

"Rock Docs: Last Days of Left Eye," 6 p.m., VH1. Lisa "Left Eye" Lopes had an elfin quality that glowed on camera. Small and slim, with a childlike face, she could instantly get viewers' support. That persona masked a sharp intelligence and an explosive personality. Lopes argued with members of her pop group, TLC; she was given probation after setting a fire that burned the mansion of her boyfriend, football star Andre Rison. In 2002, she headed to the Honduran jungle with her friends and family to make a documentary about her life. She talked candidly on camera before the SUV she was driving rolled over, killing Lopes and hospitalizing four others. Now Lauren Lazin (an Oscar nominee for "Tupac: Resurrection") has taken that Honduran footage and weaved in everything from home movies to TLC videos and interviews to bring fans this portrait of Lopes. The result is sometimes frustrating with key details missing. Lopes' personal charm, however, will keep viewers watching and caring.

OF NOTE

"Heroes," 6 a.m., Sci Fi Channel. The season finale airs Monday on NBC with the fate of New York City at stake. Before that, however, viewers can catch up. A marathon begins now and concludes at 6 a.m. tomorrow.

"Act of Honor," 4 p.m., History Channel. Born in Mexico, Rafael Peralta loved the U.S. long before he lived there. As soon as he got his citizenship, he marched into a Marine recruiter's office. When he was shot and wounded in Iraq in 2004, he saw an enemy grenade tossed near him. Peralta pulled it under his body, saving his colleagues. This documentary offers a loving portrait, including comments by other soldiers and by his family.

"Sideways" (2004), 5 p.m., FX. Alexander Payne co-wrote this clever film and directed it with subtlety and skill. Just before his friend's wedding, a quiet chap (Paul Giamatti) takes him on an excursion to wine country. The result mixes humor and human drama.

"NCIS," 7 p.m., CBS. Tony becomes a murder suspect. His colleagues scramble to learn who is framing him.

"CSI: NY," 8 p.m., CBS. A game in which players pretend to assassinate each other takes a deadly twist. In another case, the murder victim is a woman who kept suing restaurants.

"The Pacifier" (2005), 8 p.m., ABC. Tough-guy actor Vin Diesel plays a former Navy SEAL, caring for some zesty kids. It's all quite predictable, but kids and grown-ups will find it mildly entertaining.

"Law & Order: Special Victims Unit," 8 p.m., NBC. Benson (Mariska Hargitay) goes undercover, in a radical group that may be turning to terrorism. Oscar-winner Marcia Gay Harden guests as an FBI agent.

"Law & Order," 9 p.m., NBC. A rapper has been killed. Was it random, or was she targeted because of her work?

"Saturday Night Live," 10:30 p.m., NBC. Zach Braff hosts, with music by Maroon 5.