Dina Meyer reprises her guest role as Washington, D.C., madam Holly Snow in this new episode (8 p.m. CBS).
Dancing With the Stars: Country music's Reba McEntire performs on the results show (8 p.m. ABC).
American Idol: The top nine take a crack at the songs of Lennon and McCartney (8 p.m. Fox).
NOVA: The science series presents "Hunting the Edge of Space: The Mystery of the Milky Way" (8 p.m. KCET).
Southland: The police drama about the men and woman of the LAPD ends its second season (10 p.m. TNT).
Paris Hilton's British Best Friend: The celebutante seeks companionship across the pond in this new reality competition (10 and 11 p.m. TV Guide).
SPECIALSAwesome Pawsome 2: The Next Generation:
Wildlife experts work with the rare Sumatran tiger (8 p.m. Animal Planet).
The Cast of Friends: Where Are They Now: This new special catches up with the stars of the hit sitcom (8 p.m. TV Guide).
How the States Got Their Shapes: This new special surveys the boundries of America's 50 states (9 p.m. History).
Turner Classic Movies' salute to Robert Taylor kicks of with this 1935 melodrama (5 p.m. TCM).
The Mist: Thomas Jane stars in this chilling 2007 adaptation of the Stephen King terror tale (5:50 p.m. TMC).
Barcelona battles Arsenal (11:30 a.m. FSN).
Baseball: The Yankees visit the Red Sox (4 p.m. MLB) and the Angels host the Twins (7 p.m. FSN, MLB).
Hockey: The Kings visit the Ducks (7 p.m. FS Prime).
Women's college basketball: Connecticut faces Stanford in the NCAA Tournament final (5:30 p.m. ESPN).