TONIGHT'S MUST-SEE

"Loving Leah," 8 p.m., CBS. Jake is a young doctor, with a stylish girlfriend and a modern life. Then his brother, an Orthodox rabbi, dies. Jake is expected to marry the widow, Leah, or renounce the brother. Instead, he chooses a pretend marriage. The rest will surprise almost no one, yet entertain almost everyone. P'Nenah Goldstein's script (adapted from her play) is filled with warmly human characters. Lauren Ambrose ("Six Feet Under") and Adam Kaufman (Poppy Montgomery's lover on "Without a Trace" and in real life) bring immense likability to Jake and Leah. Jeff Bleckner, a two-time Emmy-winner, has directed a richly involving story.

TONIGHT'S MIGHT-SEE

"The Last Templar," 8 p.m., NBC; concludes Monday. Early on, this promises to be a crackling good adventure. A glitzy museum event is disrupted by men on horseback, in armor. They grab artifacts and gallop away; a beautiful archaeologist (Mira Sorvino) chases them, wielding a lance. After this great start, "Last Templar" can only go downhill. There are gorgeous settings and great byplay between Sorvino and Scott Foley; there's also a story like a minor-league "Da Vinci Code."

OF NOTE

Screen Actors Guild awards, 6 p.m., TNT. Here are movie and TV acting awards, plus a career award for James Earl Jones. There are also overall awards for the best ensemble in a movie ("Doubt," "Milk," "Frost/Nixon," "Slumdog Millionaire," "The Curious Case of Benjamin Button"), TV drama and TV comedy.

"The L Word," 7 p.m., Showtime. Shane keeps trying to patch up her shattered relationship with Jenny. And after making great progress in transforming from female to male, Max receives a huge setback.