Doctor Who (6:30 and 9 p.m., Sci Fi): In the fourth-season premiere (which is, oddly enough, a Christmas episode) the Doctor tries to save the people on board the Titanic — an orbiting cruise ship.

Desperate Housewives (7 p.m., Ch. 4): If you missed Sunday's very good episode, ABC repeats it tonight.

College softball (7 p.m., Ch. 11 and BYUTV): Utah at BYU

Battlestar Galactica (8 and 10:30 p.m., Sci Fi): Starbuck heads off in search of Earth, and the Cylons face a threat from within.

Canterbury's Law (8 p.m., Ch. 13): Elizabeth tries to avoid defending a confessed rapist. This is the season finale and — given the low ratings — it's probably the finale, period.

20/20 (9 p.m., Ch. 4): A report titled Your Weather: Myths, Lies and Downright Stupidity.