The Big Bang Theory

The Fermentation Bifurcation

Series 9 - Episode 22 The Fermentation Bifurcation

Saturday 11am - 11:30am E4


The writers’ chief weapon is surprise in this slice of science-friction. A wine-tasting trip excludes Bernadette and Sheldon, on the grounds of pregnancy and disinclination respectively. So Bernie doesn’t relish the prospect of their subsequent pairing for Sheldon’s “foetus-friendly festival of fun”. Keep your eye on that one. And when the guys encounter Penny’s dim-witted ex, Zack, they proceed to boast about their potentially ground-breaking research. It’s to the show’s credit – once again – that neither plot develops predictably.

On the other hand, Raj is still being a putz, and takes second-girlfriend Claire (Alessandra Torresani) to meet his friends.


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.

Cast & Crew

Leonard Hofstadter Johnny Galecki
Sheldon Cooper Jim Parsons
Howard Wolowitz Simon Helberg
Raj Koothrappali Kunal Nayyar
Penny Kaley Cuoco