Special Guest Stars Craig T. Nelson as Dale Ballard Mayim Bialik voices Amy Farrah Fowler Guest Stars Wyatt McClure as Billy Sparks Ryan Phuong as Tam Nguyen Rex Linn as Principal Tom Petersen Danielle Pinnock as Ms. Evelyn Ingram Katherine Von Till as Kimberly Emily Paige Arrington as Student Luis Victor Jimenez as Waiter
