The Big Bang Theory (7 p.m., Ch. 2): Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.
CSI (8 p.m., Ch. 2): A picture on the Internet leads the team to discover the body of a strangled call girl in a dumpster.
The Mentalist (9 p.m., Ch. 2): A woman's body is found at a mixed martial arts match; Rigsby is forced to ask Cho for a favor.
Grey's Anatomy (8 p.m., Ch. 4): A gunman opens fire at a local college, sending mass casualties to the hospital; Arizona's return is not warmly received.
Private Practice (9 p.m., Ch. 4): Addison's mother demands she do whatever it takes to keep her partner alive; a medical consultation becomes complicated for Amelia and Pete; Charlotte and Cooper give intimacy another try; Violet considers publishing a revealing book.
College football (6 p.m., ESPN): Miami of Ohio squares off against Middle Tennessee State in the GoDaddy.com Bowl.
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