S11, E24: On the eleventh season finale, Amy’s parents (guest stars KATHY BATES and TELLER) arrive along with Sheldon’s family (guest stars LAURIE METCALF, JERRY O’CONNELL and COURTNEY HENGGELER). And everybody’s focused on making sure all goes according to plan – everyone except the bride and groom. MARK HAMILL and WIL WHEATON also guest star.