Episode 8 of "Sabrina, the teenage witch"
s01e08 Magic Joel

Hoping to catch Harvey's eye, Sabrina becomes an assistant to Joel, a shy teen magician, but the act is more comical than bewitching when the trickster's tricks misfire. To save him from embarrasment, Sabrina makes the magic man temporarily invisible - then discovers that he likes it and doesn't want to reappear, especially when he can scope out the girls' locker room. Meanwhile, Aunt Zelda entertains an old colleague who has been too shy to admit his attraction to her.