The Big Bang Theory : The Helium Insufficiency (2015)
Directed by Mark Cendrowski / Nicole Lorre / Chuck Lorre / Bill Prady / Nikki Lorre
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Synopsis
A helium shortage leads Sheldon and Leonard to do business with a dealer in the black market in order to acquire some of the element for an experiment they need to complete. Meanwhile, Penny and Bernadette download a dating app on Amy's phone in hopes that she'll connect with a new man.