This is based on opinion. Please don't list it on a work's trope example list.
Tear Jerker / Sabrina the Teenage Witch
The Season 6 episode "The Whole Ball of Wax", at the end when it looked like Sabrina's mom died from being next to an iron.
Season 5's Christmas Episode really makes you feel sorry for Morgan when you see what Christmas is like with her family. Initially seeming perfect, it turns out they fight a lot and her father shows no appreciation for the gift she went to a lot of effort to get. It turns out that Morgan invited Sabrina along because she hoped her family would be nicer with a friend around.