Sheldon and Penny bond over missing Leonard, who surprises Penny when he comes home early. The joy doesn’t last long. They learn that a drunken Penny had married one of her ex-boyfriends in Las Vegas. Penny annuls the marriage, but she later gets drunk once again and proposes to Leonard. She takes his discomfort at agreeing while she’s intoxicated as rejection. Leonard offers to support Penny so that she can pursue her acting career full time. Eventually, the engagement is made official.
Raj scores another steady thing with a girl named Emily. Sheldon is the only one left feeling empty-handed. Despite enjoying his first kiss with Amy, he doesn’t know what will happen to him. After Leonard and Penny’s engagement, the comic book shop burns down and the university refuses to let him change fields. He leaves town to figure out what he’s going to do.