Sabrina the Teenage Witch (TV series)/Fridge

Fridge Brilliance

 * Donald Faison played the exact same character when he appeared in Magic Joel (season 1) and Rumour Mill (Season 2); that's why he wanted to become a magician's assistant when he appeared in the mortal realm in Magic Joel.
 * Likewise, Lindsay Sloane was the same character in Sabrina and in Bring It On. She was so sick of being a victim that she dyed her hair and changed personality entirely when she moved. That or she accidentally drank a confidence/ambition potion.

Fridge Horror

 * Multiple of Sabrina's friends (and enemies) disappeared from the show without explanation. This applies to the comic and animated series (Cousin Ambrose) as well as the live-action show. Considering the supernatural aspects of the show, it is tempting to think magic had something to do with it...