The Dark Knight and your favorite psychologist-turned-supervillain form an unlikely partnership in the new DC Universe original animated movie, Batman and Harley Quinn, coming to a theater near you for one night only August 14.

A looming global catastrophe forces Batman and Nightwing to enlist Harley Quinn to catch her BFF, Poison Ivy, before she and the Floronic Man destroy humankind. But Harley is not about to change her (unpredictable) ways, and neither is the uptight Caped Crusader. Can they deal with their differences to save the planet? 

This one-night event also features a sneak peek at a Harley Quinn featurette. Check out the trailer above, then buy your tickets here.