The Ellen DeGeneres Show
(3 p.m., NBC10) - Author Portia de Rossi.
NCIS (8 p.m., CBS3) - Gibbs' former mother-in-law becomes a witness in a murder investigation.
Glee (8 p.m., Fox29) - Artie discovers that Brittany still believes in Santa Claus.
One Tree Hill (8 p.m., CW57) - Brooke deals with the mounting financial problems at Clothes Over Bro's.
NCIS: Los Angeles (9 p.m., CBS3) - A Marine is killed by an exploding cell phone.
Saturday Night Live Presents: A Very Gilly Christmas (9 p.m., NBC10) - Holiday-themed sketches, including classics from Alec Baldwin and the duet by Andy Samberg and Justin Timberlake.
Billy the Exterminator (9 p.m., A&E) - Some of Billy's most memorable jobs.
Detroit 1-8-7 (10 p.m., 6ABC) - The owner of a carwash is tortured and fatally shot.
Glory Daze (10 p.m., TBS) - The Omega Sigs rush to whip the house into shape when an adviser from the national chapter is due to visit.
The Daily Show With Jon Stewart (11 p.m., COM) - Michelle Williams.
Conan (11 p.m., TBS) - Kevin Spacey; Kristen Schaal; Los Lobos performs.
Late Show With David Letterman (11:35 p.m., CBS3) - Jamie Foxx; Sofia Vergara; holiday toys.
The Tonight Show With Jay Leno (11:35 p.m., NBC10) - Emma Stone; Jarod Miller; Sharon Jones and the Dap-Kings.
Lopez Tonight (Midnight, TBS) - Terrell Owens; Betty LaVette and The Ese Vatos.
Jimmy Kimmel Live (12:06 a.m., 6ABC) - Mila Kunis; Ian Somerhalder; Social Distortion.
The Late Late Show With Craig Ferguson (12:37 a.m., CBS3) - Jane Fonda.