TONIGHT'S MIGHT-SEES

"Torchwood" season finale, 9 p.m., BBC America (Oceanic Digital 341). The season opened with a superb performance by James Marsters. Now he's back. Marsters — who was Spike on "Buffy the Vampire Slayer" — plays Captain John Hart, a rogue agent. Tonight, he sends Jack back in time.

The rest of the team tries to save the city without its leader. That follows an 8 p.m. rerun with flashbacks. We see Jack, who ages well, joining the team in Victorian England of 1899.

"Harry Potter and the Prisoner of Azkaban" (2004), 7 p.m., ABC. The third Potter film added Emma Thompson and David Thewlis to the faculty, with Michael Gambon replacing the late Richard Harris. Also, Alfonso Cuaron took over as director. His dark style may fit this story: Harry confronts someone who may have helped kill his parents.

OF NOTE

— "The Suite Life of Zack & Cody," 7:30 p.m., Disney Channel. Jaden Smith — who was so good starring with his dad (Will Smith) in the "Pursuit of Happyness" — guests. He plays a worldly kid, helping the guys impress their dates.

— "Cold Case," 7 p.m., CBS. In a rerun, Miller feels the murders of two young teens — one rich, one not — were related.

— "The Naked Brothers Band," 5:30 p.m., Nickelodeon. This likable young band starts its first tour, amid jealousy. The episode includes the debut of the song, "Body I Occupy."

— "Training Day" (2001), 6 p.m. and 8 p.m., Bravo. Denzel Washington won an Oscar for portraying a jaded and corrupt cop.

— "Saturday Night Live," 10:29 p.m., NBC. This rerun has Amy Adams hosting, with music by Vampire Weekend.