Poll: When Family Shows KILL?

Cult children's television show from Hanna-Barbera Productions, The Banana Splits Adventure Hour (1968-1970) under the appropriate yet misleading title of The Banana Splits Movie(2019) has received its 2019 Comic Con debut. The hippy-dippy variety show filled with life-sized monsters has moved into full on horror/slasher flick territory from the SyFy Network. Which of the following (nonhorror related) family friendly TV series should follow suit and move (beyond existential horror) into the horror genre (if for at least one movie adaptation)? Let's ruin other people's (or our own) childhoods and discuss this sinister poll over here.