Season 10, Episode 20 – The Recollection Dissipation
Sheldon’s working overtime and pushing himself to the limit when he collaborates on projects with Leonard and Wolowitz, and another one with Amy, all on the same day. Meanwhile, Bernadette’s maternity leave is running out and she must face going back to work.
What happens when hyperintelligent roommates Sheldon and Leonard meet Penny, a free-spirited beauty moving in next door, and realize they know next to nothing about life outside of the lab. Rounding out the crew are the smarmy Wolowitz, who thinks he’s as sexy as he is brainy, and Koothrappali, who suffers from an inability to speak in the presence of a woman.