This compendium of three holiday-themed episodes of the sitcom THE BIG BANG THEORY includes THE BATH ITEM HYPOTHESIS, THE MATERNAL CONGRUENCE, and THE SANTA SIMULATION.
Johnny Galecki - American Actor, formerly on "Roseanne"
Sara Gilbert - American TV Actress
Kaley Cuoco - Star, DEBATING ROBERT LEE (2004)
Mayim Bialik - American television actress, BLOSSOM
Kevin Sussman - Actor, UGLY BETTY
Margo Harshman - Actress
Pasha Lychnikoff - Russian actor
Kate Micucci - Actress