Season 10, Episode 3 - The Dependence Transcendence
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, who shocks them both by saying that Amy is popular. When Raj helps Bernadette prepare the house for the arrival of her baby, she admits that she doesn't feel ready to be a mother.