The Big Bang Theory - The Fermentation Bifurcation (Sneak Peek 2)

The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when she can’t go wine tasting with the group, and things don’t go as planned when Koothrappali introduces his new girlfriend, Claire, on NEW The Big Bang Theory, Thursday April 28th at 8/7c. Only CBS