S1·E13 Kelly and the Professor (2)
Aired December 14, 1993
Synopsis
A jealous Zack strikes back at Kelly and Professor Lasky with a vengeance by spreading the word about their affair, which climaxes at a costume ball. Meanwhile, Rogers gives the rest of the gang papers to fill out on a perfect mate profile for a psychology project, and Screech ends up getting the same mark as Alex.