Dateline’s To Catch a Predator: Part II of an investigation into internet pedophiles. 8 p.m. on NBC
Bastards of the Party: A documentary that looks at L.A. gang warfare since the 1940s, with special attention paid to the Bloods and Crips. 10 p.m. on HBO
The Supreme Court: A Nation of Liberties; the Rehnquist Revolution : One of a four-part PBS documentary tracing the role of the Supreme Court in history. “A Nation of Liberties” continues on from the 1940s. 9 p.m. on Channel 13 (PBS)
Lost: The series returns this week with 16 new episodes “and no repeats.” You promised. 9 p.m. on ABC
Survivor: The reality show with every-waning ratings has a new season in the Fiji Islands. Contestants include a Miss USA pageant coach and a construction worker named “Boo.” 8 p.m. on CBS
Forgotten Genius: Nova discusses the scientific accomplishments of Percy Julian. Part of WLIW21’s Black History programming. 8 p.m. on WLIW21.
A Charlie Brown Valentine: Charlie Brown wants to invite the lovely Peanut only known as “the little red-haired girl” to a Valentine’s Day dance. 8 p.m. on ABC
The Grammys: Timberlake hosts the 49th Annual Grammy Awards. SexyBack is up for Album of the Year, natch. Against John Mayer. 8 p.m. on CBS