The 8 Most Toxic Television Couples (5 of 5)

Harley and the Joker on “Batman: The Animated Series”

When the Joker treats his arch-nemesis Batman better than his own girlfriend, that’s probably a sign that Harley needs to find a new playing card suit to date, whether it’s a King, Queen, Jack, or even the number 5. Not only does the Joker constantly lower Harley’s self-esteem, he literally throws her off desks and even out windows. All the time, he admits he’s only dating her to get what he wants. At this point, we would beg her to date any other clown — even Ronald McDonald. And we typically would not encourage anybody to come within 10 feet of that guy.