College baseball: BYU vs. Loyola Marymount, 6 p.m., BYUtv

The Big Bang Theory (7 p.m., Ch. 2): When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.

Missing (7 p.m., Ch. 4): Becca's CIA mentor helps search for Paul's assassin.

Community (7 p.m., Ch. 5): A disagreement about pillows and blankets transforms into a war on campus.

American Idol (7 p.m., Ch. 13): Contestants face elimination.

Rules of Engagement (7:30 p.m., Ch. 2): Audrey raises funds to help her maid get an operation

30 Rock (7:30 p.m., Ch. 5): Pete's self-evaluation spurs Jack to take him on as a project.

Person of Interest (8 p.m., Ch. 2): When the machine names the dons of New York's crime families, Reese and Finch suspect that Elias is targeting his competition.

Grey's Anatomy (8 p.m., Ch. 4): An escaped lion puts lives and relationships in danger.

Touch (8 p.m., Ch. 13): Martin comes across a man who has a history with his late wife.