Amanda Payton

Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Meanwhile, Leonard's mother, Beverly, comes to town and Penny struggles to make a connection with her.

Capt. Strand and the 126 help a husband whose wife "dies" when she is not upside-down; Grace takes a call from a pizza delivery driver who is in for the shock of his life; Tommy is worried Trevor's young daughter is a bad seed.

Sheldon visits the California Institute of Technology for the very first time. Georgie is furious when Mary listens in on a phone call with his girlfriend, and Meemaw tries to cheer up a jealous Missy.

Torres and Sloane run protection detail for US Senator Phillips in Afghanistan but must return to the States after hearing the senator's son is in the ICU.

Voight employs his new informant to help solve a tricky drug trafficking case; Atwater, who once again struggles to reconcile his personal and professional life, reaches a decision.

Adam, Blake and Ders attempt to impress a group of festival girls by organising their own version of Coachella.