Elsewhere on TV ...
Republican presidential debate (6 p.m., CNN): Live from Jacksonville, Fla.
Men's college basketball: Hawaii at Utah State (7 p.m., Altitude); Utah at UCLA (8:30 p.m., Fox College Sports - Pacific)
The Big Bang Theory (7 p.m., CBS/Ch. 2), Raj forms an odd (even for him) bond with his cell phone.
30 Rock (7 and 8 p.m., NBC/Ch. 5): Jack meddles in Liz's love life; Jack and Liz battle over her contract.
American Idol (7 p.m., Fox/Ch. 13): Auditions continue.
Project Runway: All Stars (7 p.m., Lifetime): Designers have just six hours to complete this week's challenge.
Rob (7:30 p.m., CBS/Ch. 2): Rob and Maggie have their first fight. Over a pillow.
Parks and Recreation (7:30 p.m., NBC/Ch. 5): Leslie and Ben plan a bowling party.
The Finder (8 p.m., Fox/Ch. 13): A NASA scientist asks Walter for help finding a woman he met at a bar.
The Firm (9 p.m., NBC/Ch. 5): Mitch defends a gambler who's accused of murder.
Archer (11 p.m., FX): Cyril is promoted to field agent.