Amy breaks up with Sheldon after she thinks he’s more interested in The Flash than in her. Sheldon gets back together with Amy after realizing how much he loves her because of a Beach Boys song. As his Birthday present to her, Sheldon has sex with Amy for the first time. After Dr. Norwitzki comes back, Sheldon asks Amy to marry him and she says yes. They have Mark Hamill do the wedding ceremony for them. 