The Big Bang Theory Season 7 Episode 23
The Gorilla Dissolution
Howard's mother gets injured when a treadmill falls on her. Howard and Bernadette take care of her every need while she's bedridden. They realize she's a good test for when they have a baby. In the end, they get a nurse to take care of her.
Penny gets fired from her movie and re-evaluates her life. She realizes that Leonard makes her happy. They get engaged in an awkward conversation, but then he gets down on his knew and proposes with a ring.
Raj sees Emily out with another guy. He's not upset, but she stops by after the date. She doesn't want him to see other women. They decide to be exclusive and get intimate.