S1·E25 Episode 25

There is a major dance at the Swans Club. Jimmy asks Callie to the dance. Sydney can't decide what to wear and lends Sandy a dress when she comes over. Mila's agent comes to town to offer her a new role, and she turns it down. Mila doesn't choose the dress her mother picked out for her. Sydney has her world turned inside out when Garrett gives her "proof" that she and Sandy were switched at birth as infants.