The Big Bang Theory 2007
TV-PG

- Season 9 Episode 22 - The Fermentation Bifurcation

Synopsis: The Fermentation Bifurcation: 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.....
Aired: Apr 28, 2016
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