8 p.m., FOXAdam Lambert serves as a mentor for the contestants.
9 p.m., CBSJorge Garcia) wonders what he should do next, and the Locke monster (Terry O'Quinn) is curious about the latest arrival to his camp. Oh, the intrigue!
9:28 p.m., FOXLea Michele) gets involved with Vocal Adrenaline's star singer, Jesse St. James (Jonathan Groff)—so Mr. Shu (Matthew Morrison) visits their advisor (Idina Menzel) to see if St. James is spying.
Season 1 finale, 9 p.m., CWHeather Locklear) fires Ella (Katie Cassidy)—and Ella fires back. Plus, David (Shaun Sipos) and Lauren (Stephanie Chaves-Jacobsen) get back together with no help from Morgan (Melissa Ordway).
10 p.m., FXTimothy Olyphant) father (Raymond J. Barry) is arrested, so Raylan has to bail him out of jail. How's that for being a good son?
Also on the airwaves...
Dancing with the Stars, 8 p.m., ABC
The Biggest Loser, 8 p.m., NBC
90210, 8 p.m., CW
V, 10 p.m., ABC
Parenthood, 10 p.m., NBC
Millionaire Matchmaker, Season 3 finale, 10 p.m., BRAVO
Law and Order: Criminal Intent, 10 p.m., USA
NBA Basketball: Celtics v. Bulls, Nuggets v. Suns
What are you watching tonight?
Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom