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Bert (Brian Posehn) welcomes Amy and Penny to his apartment where he's throwing a party.
The Dependence Transcendence
Season 10, Episode 3 - Aired October 3, 2016
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.