Cybill (1995)

S2E4 Cybill With an 'S'

Ira shows up at Zoey's sweet sixteen celebration with his new girlfriend, and both Cybill and Maryann are initially impressed by her. However, their excitement quickly fades when they realize she struggles with severe multiple personality disorder. Meanwhile, Zoey finds herself drawn to Sean, a busboy from the restaurant, and the two share an undeniable chemistry.