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Penny raises her hand as she and Amy talk to Bert (Brian Posehn) in his apartment.
'The Dependence Transcendence' - Season 10, Episode 3
When the guys work long hours to try finish their project for the military on time, Sheldon struggles to stay awake and turns to energy drinks to keep going. Meanwhile, Penny and Amy attend a party being thrown by Bert, the geologist, and Koothrappali helps Bernadette prepare the house - and herself - for the arrival of her baby.
Air Date: October 3, 2016.