Season 7, Episode 8 - The Itchy Brain Simulation
Aired November 14, 2013
When a past mistake of Leonard's comes to light, he's surprised that Sheldon promises not to make a big deal out of it. Sheldon instead makes Leonard walk a mile in his shoes to learn what it feels like to be tormented by trivial matters. Meanwhile, Penny embarrasses Raj when she confronts his ex-girlfriend, Lucy.
Season 10, Episode 8 - The Brain Bowl Incubation
Aired November 10, 2016
When Sheldon and Amy successfully combine their genes and cultivate brain cells, Sheldon thinks they should go a step further and have a baby together. Meanwhile, when Raj meets a woman at work he finds himself embarrassed to tell the guys about her job at the university.