The Big Bang Theory
S9 E22 • The Fermentation Bifurcation
The gang goes to a bar and runs into Penny's old boyfriend Zack, while Bernadette is left to spend the evening with Sheldon when she cannot go wine tasting with the others. Elsewhere, things do not go to plan when Raj introduces his new girlfriend, Claire. Comedy, starring Johnny Galecki, Jim Parsons and Kaley Cuoco.