Jerry Seinfeld Jerry Seinfeld Actor Jason Alexander George Costanza Actor Michael Richards Cosmo Kramer Actor Julia Louis-Dreyfus Elaine Benes Actor Philip Baker Hall Lt. Bookman Guest Star Ashley Gardner Marion Actor Harris Shore Mr. Lippman Guest Star Cynthia Szigeti Sherry Becker Guest Star Biff Yeager Mr. Heyman Guest Star Neal Lerner The "Shusher" Guest Star Marie Barrientos Receptionist Actor Joshua White Director Larry Charles Writer