The Polar Express

(8-10 p.m., DISN) - Tom Hanks provides the voice and movements for five characters, including the boy hero, in this visually lavish computer-animated adaptation of the Chris Van Allsburg picture book. It's about a boy in the throes of a Santa credibility crisis, who takes a magical train ride on Christmas Eve.

CSI: Crime Scene Investigation

(9-10 p.m., CBS3) - Bad doggy! The murder of a socialite leads Grissom (William Petersen) and the gang down an unlikely road - into illegal dogfighting circles. Something besides dogs is dogging Warrick (Gary Dourdan), who's a suspect in the murder of an exotic dancer. The new episode "Lying Down With Dogs" includes a special treat: a performance by Dr. Robbins and the DeComps Band, series costar Robert David Hall's group.

Saturday Night Live Christmas

(9:30-11 p.m., NBC10) - The holidays always have been prime targets for the late-night

SNL

crew, from the days of John Belushi and Gilda Radner to the present. This compilation special offers yuletide sketches from years gone by, featuring

SNL

veterans Dan Aykroyd, Eddie Murphy and Adam Sandler (who performs his "Hanukkah Song"). Ana Gasteyer stars in "Martha Stewart's Topless Christmas." Jimmy Fallon and Tina Fey host.

SEMA 2007: The World's Greatest Car Show

(10-11 p.m., TLC) - Some might dispute the title of this new special, as the SEMA - that's Specialty Equipment Marketing Association - show isn't a car show per se. It's a showcase for the latest and up-to-datest in cool accessories for motor vehicles, although there are some actual cars present. If you have a car buff in your life and a little extra money to spend on his or her holiday gift, this may give you some ideas.

Big Shots

(10-11 p.m., 6ABC) - Weddings bring out the romantic in everyone. OK, maybe not everyone. James (Michael Vartan) plans to use Lisbeth and Terrence's (Paige Turco, Paul Blackthorne) nuptials as an opportunity to take Katie (Nia Long) on a date. Brody (Christopher Titus) is finding a beautiful stranger (guest star Charisma Carpenter) hard to resist. Duncan (Dylan McDermott) wants to pilfer a model from a rival cosmetics company.