Cybill S02 E04 Cybill With an 'S'

"A comedy about the best 10 years of a woman's life... between 39 and 40."

Ira brings his new girlfriend to Zoey's sweet sixteen birthday party, and Cybill and Maryann both like her until they discover she has uncontrollable multiple personalities; Zoey and Sean, a busboy from the restaurant, are mutually smitten.