Sheldon re-evaluates the time he spends with Amy when she takes a job at the university. Meanwhile, Howard is forced to sleep on his friend's sofa after he gets into an argument with Bernadette.
Sheldon introduces Amy to Raiders of the Lost Ark - one of his favourite films - and is distraught when she ends up pointing out a plot hole that ruins the whole story. Meanwhile, Leonard realises he can manipulate Penny into feeling sorry for him when his mother publishes a reveal-all book about his childhood problems.
Leonard returns from his research expedition in the North Sea early and undergoes an adjustment period with Sheldon. Howard experiences an unusual emotional reaction as a result of his relationship with his mother.