The Big Bang Theory Season 7 Episode 24
That Status Quo Combustion
Leonard and Penny tell their friends and family they are engaged.
Raj and Emily had sex and he brings it up whenever he can.
Leonard approaches Sheldon about their living arrangements. Sheldon doesn't understand how Leonard can put Penny before him. Amy suggests that Sheldon moves in with her and he rejects that idea.
Howard and Bernadette can't keep a nurse for his mother. Penny gives it a try and doesn't last a day.
Stuart's comic book store had a fire.
Sheldon decides to leave and goes to the train station. Leonard and Penny go to stop him, but end up letting him go.
Stuart needs a place to stay, so Howard offers to have him work for his mother. Stuart and Mrs. Wolowitz get along great. It's a dream job for him.
Sheldon does well on his sabbatical. Amy's mad that Leonard let him go.