Harley Quinn Highway

Harley brings her crew back together and apologizes to them before requesting their help in rescuing Ivy. They agree to do so, but only for Ivy's sake. Meanwhile, Scarecrow harvests Ivy's pheromones so he can use them to destroy Gotham before poisoning her with his fear toxin, sending her into a panic. Psycho brings the crew into Ivy's head while Borgman protects their bodies. Inside her head, Frank informs them the only way to save Ivy is to destroy the thing she fears the most, which appears in the form of the Grim Reaper. Harley defeats the Reaper, but sees her face under the hood before they wake up. Scarecrow tries to escape on the Harley Quinn Highway, but Borgman transforms into a car so the crew can give chase. Amidst said chase, Ivy tells Harley her fear is being abandoned by someone she trusted and that she resents her for being with the Joker instead of helping her. Harley attempts to make amends by blowing off the head of her statue to stop Scarecrow, but he succeeds in poisoning the Gotham Reservoir and infecting the city's water supply with Ivy's pheromones; turning most of Gotham's trees into violent monsters.