Saved by the Bell

1-900-CRUSHED (2x11)

Air date: Nov 17, 1990

Zack, Lisa and Screech open their own advice hotline. Soon Lisa becomes a hit, but Zack becomes so envious that he fires her. Soon he and Screech start giving out rotten advice which creates a riot in the school and a mix up between Kelly and her sister who also has a crush on Zack.