Penny purposely ruins a good night with Leonard and explains that it's because she has commitment issues. Leonard promises not to ask her to marry him again in response.
Frodo, the Hobbit charged with destroying a ring full of evil power, collapses in exhaustion. Sam doesn't want to lose his friend to the power of the ring and does everything he can to insure its destruction.
Penny admits to Leonard that she has commitment issues, which explains why she freaks out every time Leonard proposes to her. Leonard offers a novel solution by letting Penny propose to him whenever the timing is right for her.
The President asks his assistant, Donna, to talk to one of her former teachers on the phone, as they recently found out she was retiring. Once Mrs. Molly Morello is on the phone, Donna mentions that she is in the oval office with the President of the United States because of the profound impact Mrs. Morello had on her. This scene can be used during new staff training to discuss the impact that teachers make on their students.