L.O.D.R.S.V.P.

After Harley's crew steals jewels from Atlantis, they are invited to join the Legion of Doom. Lex Luthor even allows Doctor Psycho to be reinstated under the condition that he does not fight any female superheroes. Then he secretly reveals to Ivy that he is not actually interested in Harley and will not let her join unless she joins as well. Ivy angrily refuses and tries to warn Harley of Luthor's treachery. Aquaman breaks into the Hall of Doom and beats up several villains while seeking revenge for Harley's theft, but she tricks him into breaking an aquarium and leave to save the fish. As thanks, the Legion inducts Harley as an official member. Harley accuses Ivy of lying to her and they angrily part ways. Meanwhile, Psycho and Borgman deal with a tentacled monster in their mall lair's basement, which they later learn is Borgman's mutated sister, Mirielle. Psycho uses his psychic powers to let the siblings communicate and reconcile, but Mirielle is released into the streets and goes on a rampage. The next day, Harley and her crew minus Ivy go to the Hall of Doom, where Luthor tells Harley that Joker wanted to see her.