"The Crazy Ones" (9 p.m., CBS): Creepy stalker alert: Pop star Josh Groban drops in on the freshman sitcom tonight. He plays a former co-worker of Sydney's (Sarah Michelle Gellar) who is obsessed with her.
"30 for 30: The Price of Gold" (9 p.m., ESPN): The acclaimed sports documentary series takes a fresh look at the weeks before the 1994 Winter Olympics when figure skater Nancy Kerrigan became the victim of a bizarre attack plotted by the husband of Tonya Harding, her chief American rival. Harding is interviewed extensively in the riveting piece, but Kerrigan did not participate.
"Under the Gunn" (9 p.m., Lifetime): Tim Gunn of "Project Runway" fame tries to make it work in a new fashion reality series that has him overseeing a competition that pits teams of designers against each other.
Also on Thursday: