The Big Bang Theory (7 p.m., Ch. 2): Sheldon finds himself haunted by Mr. Spock.
Missing (7 p.m., Ch. 4): As Becca searches for Michael in Europe, the surprise arrival of her best friend causes complications.
Community (7 p.m., Ch. 5): Shirley, Pierce and Britta plot against the new sub shop in the cafeteria.
American Idol (7 p.m., Ch. 13): The contestants face elimination.
The Vampire Diaries (7 p.m., The CW): Damon and Stefan enlist Elena, Caroline and Matt to help with their new plan to destroy Klaus.
College volleyball (7 p.m., BYUTV): Cal State Northridge at BYU
Rules of Engagement (7:30 p.m., Ch. 2): Jeff sends Audrey on a romantic scavenger hunt that has mixed results.
30 Rock (7:30 p.m., Ch. 5): Jack works to come up with an idea that will transform KableTown.
Person of Interest (8 p.m., Ch. 2): The machine directs Reese and Finch to a person who has almost no digital footprint and seems to be living a double life.
Grey's Anatomy (8 p.m., Ch. 4): Lexie watches Zola as Meredith and Derek try to have a night to themselves.
The Office (8 p.m., Ch. 5): Robert California brings his wife into the office to find her a job.
Touch (8 p.m., Ch. 13): Martin meets a homeless man who shares Jake's obsession with numbers.
Up All Night (8:30 p.m., Ch. 5): Personal responsibilities get in the way of Reagan and Ava booking Stevie Nicks on the show.
The Mentalist (9 p.m., Ch. 2): While investigating a casino employee's murder, Jane encounters a magician he used to tour with and learns he is hiding something.
Private Practice (9 p.m., Ch. 4): Charlotte and Cooper bring Erica to Seattle Grace to speak with Amelia, Derek and Lexie about a risky surgery.
Awake (9 p.m., Ch. 5): When his tracking methods are questioned, Detective Britten becomes a suspect in his own case.
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