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For the first time in three weeks, there's a new episode of "The Big Bang Theory" (7 p.m., CBS/Ch. 2).

When Leonard and Sheldon are invited to speak at UC Berkeley, they take a detour to try to meet an idol. Meanwhile, back at home, Bernadette wants to sell Howard's life-size TARDIS at a garage sale.

(If you don't know what a TARDIS is, ask a "Doctor Who" fan.)

Oh, and there's a funny "Game of Thrones" joke.

Elsewhere on TV ...

College softball (4 p.m., P12N): Cal at Utah

College baseball: Portland at BYU (6 p.m., BYUtv); Arizona State at Utah (6 p.m., P12N)

"Grey's Anatomy" (7 p.m., ABC/Ch. 4): A group of children visit the hospital on a field trip and observe two injured cops rushed into the emergency room.

"Bones" (7 p.m., Fox/Ch. 13): An affluent school teacher is found dead in an abandoned bookstore.

"The Odd Couple" (7:30 p.m., CBS/Ch. 2): Oscar and Felix attend the wedding of an old college friend,

"Scandal" (8 p.m., ABC/Ch. 4): David wants to solidify his case against B613 by finding former members.

"The Blacklist" (8 p.m., NBC/Ch. 5): The team hunts a female frame-up artist targeting the moneyed elite

"Backstrom" (8 p.m., Fox/Ch. 13): A key witness in a drug investigation is found dead after escaping from his court-mandated rehab program.

"Mom" (8:30 p.m., CBS/Ch. 2): Christy and Bonnie face temptation when Bonnie is prescribed pain medication for a back injury.

"Elementary" (8 p.m., CBS/Ch. 2): A driver for a ridesharing company is intentionally run over by a city cab.

"American Crime" (9 p.m., ABC/Ch. 4): Aubrey convinces Carter to make a run for Canada to keep him from facing trial and a possibility of the death penalty.

"The Slap" (9 p.m., NBC/Ch. 5): The prosecution acquires Ritchie's photographs of the slapping incident; Harry and Thanasis leak a dark story from Ritchie's past. (Series finale)

"Vikings" (11 p.m., History): The populace of Paris is in a panic after the appearance of the Viking fleet.

"Dig" (11 p.m., USA): Peter delves into Emma's past, which leads to the discovery of a long-hidden, ancient symbol.