Creagen Dow

Sheldon and Amy host a special live Valentine's Day episode of "Fun with Flags." While Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub; and Raj is torn between Emily and the cute girl he met at the Comic Book Store.

Castle and Beckett investigate the case of a rich teenager found dead of a gunshot wound in a boat in Central Park lake; Castle becomes more involved in Alexis' life and make sure she is on the right track.

Eric considers the management-company offer while trying to patch things up with Ashley after a Freudian slip. Ari finally gets Mrs. Ari to forgive him at home, but an appearance by Mrs. Klein tests his resolve at work. Drama tries to protect Jamie-Lynn from a disreputable network executive.

On a school camping trip, Miley and Lilly strike back at Amber and Ashley with a fake bear attack. However, their retaliation ultimately serves to backfire when the bush they'd hidden in turned out to be poison oak and Miley can't contain her itching during a televised interview with a popular VJ. Robby and Jackson attempt to catch a mouse on the loose and come to appreciate its musical talents instead.

Hannah Montana is anxious to unveil her first major billboard campaign but when Miley goes for a sneak peek, she discovers that a zit has been added to her face. Meanwhile, Lilly has lost her contacts and is stuck wearing an unsightly pair of glasses and vows not to compete in an upcoming skateboard competition. In an attempt to convince Lilly that looks don't matter, Miley allows Hannah's zit to be exposed. Rico tricks Jackson into jumping through hoops in order to get a raise.