The Big Bang Theory

The Helium Insufficiency

Series 9 - Episode 6 The Helium Insufficiency



The title of this episode, The Helium Insufficiency, might make you think microbiology’s Betty Boo, Bernadette, has lost her voice. But no. You remember Sheldon and Leonard’s super-fluid hypothesis? Well, news that Swedish scientists want to prove the theory sends the boys into a frenzy of activity to do it themselves, but they need liquid helium for their experiment. Perpetual antagonist Barry Kripke is withholding the university’s supply, so the guys ponder a black-market option.

Elsewhere, the others get Stuart to download a dating app onto lovelorn Amy’s phone to find her an ideal match. Amy’s newfound freedom is giving much-deserved extra work to Mayim Bialik. Maybe Amy will even ditch the cardigan...


In the middle of a nationwide shortage of liquid helium, Sheldon and Leonard take desperate measures to obtain the supplies they need in order to prove a scientific theory before a rival team of researchers can beat them to it. Meanwhile, Penny and Bernadette download a dating app onto Amy's phone in order to find her a new boyfriend.

Cast & Crew

Leonard Hofstadter Johnny Galecki
Sheldon Cooper Jim Parsons
Penny Kaley Cuoco
Howard Wolowitz Simon Helberg
Raj Koothrappali Kunal Nayyar
Amy Farrah Fowler Mayim Bialik
Bernadette Rostenkowski Melissa Rauch
Stuart Bloom Kevin Sussman
Barry Kripke John Ross Bowie
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