We learn the reason for Harry’s strictness: he previously guided a witch named Fiona who was institutionalized and eventually committed suicide after trusting the wrong person with her secret.
The third episode of the 2018 Charmed reboot, titled marks a significant turning point where the sisters begin to grapple with the "Personal Gain" rule while facing their first major atmospheric villain, the Harbinger. Plot Breakdown: Halloween and the Harbinger
Some viewers found the dialogue for Mel to be "heavy-handed" or "preachy," particularly regarding social commentary, though others felt it was consistent with her character's flaws as a women's studies teacher.
Set during Halloween, the episode focuses on the sisters trying to balance their newfound magical duties with their social and professional lives.