Episode 78 of "Sabrina, the teenage witch"
s04e03 Jealousy
Title: Jealousy
Original Air Date: 10/08/1999 on ABC
Plot Outline:
Sabrina turns green with envy, literally, after Harvey and Brad become best friends, triggering a case of Jealotosis - an intense green-eyed witch envy - when Harvey teams up with Brad instead of her to write an article for the school paper.