BIG_BANG_slider Thursday

Tonight at 8:00pm

“The Fermentation Bifurcation” – The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack (Brian Thomas Smith). 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 (Alessandra Torresani), on a rebroadcast of THE BIG BANG THEORY, Thursday, July 28 (8:00-8:31 PM, ET/PT) on the CBS Television Network. (Originally broadcast 4/28/16.)