After Harley receives access to Bruce Wayne's mind, she gets stuck in an endless loop of his most formative memory.

After her terraforming plan goes awry, Ivy is enticed by an offer to take over the Legion of Doom, while Harley questions her path forward.

Harley goes overboard in her attempts to give Ivy the best Valentine’s Day ever. Bane’s efforts to impress an unexpected date go horribly awry. Clayface engages in some self-love.

After Lena divulges Brainiac's plans to the Daily Planet, Harley, Clayface, Bane and Frank try to take him down with an original musical.

When The Joker runs for mayor of Gotham, Two Face attempts to sabotage his campaign.

Harley and Ivy struggle to find their footing in their new respective roles in the Bat Family and the Legion of Doom.

As Harley and Ivy attempt to save Metropolis from complete destruction, Bruce, the Joker and Lois form an unexpected alliance.

When an inadvertent plant zombie apocalypse breaks out in Gotham, Harley fights to save the city, while Ivy embraces her inner supervillain.

After breaking the Bat Family’s #1 rule, a demoted Harley shadows Alfred, while Ivy finds an unexpected mentor at a networking event.

While Lex lays siege to the LOD after coming up short with his Ozone Machine, Bane travels to Italy to fix a pasta-maker… and win Nora’s affection.

In a bid to stop Lex, Ivy competes in a celebrity golf tournament. Meanwhile, Harley learns a dark truth about herself... from herself.

In search of a nemesis, Harley goes after Batman, but ends up with an adolescent Robin, making her the laughing stock of the criminal underworld.

Lex Luthor keeps Ivy on a short leash at a conference on the moon, while the Bat Family rents out Wayne Manor after Talia slashes company finances.

Old wounds and fears bubble to the surface when Harley and Ivy are invited to a meet and greet for their condo building.

Harley infiltrates a gala on a mission to confront Frank's captor... only to be entangled in another evil plot.

Harley’s desire to spend more time with Ivy sends them to a post-apocalyptic future. Batgirl seeks out a killer. Joker gets caught in a lie.

Ivy crashes a birthday party on the moon. Harley contemplates how to best avenge her friend.

Determined to become one of the vaunted Legion of Doom, Harley attempts to make a big splash by crashing one of their criminal enterprises with the help of her BFF, Poison Ivy.

When Harley suffers a paralyzing identity crisis, her crew must enter Harley’s mind to free her with the help of Dr. Psycho’s telepathic powers.

Harley, Ivy, and Nora travel to New Orleans in search of Swamp Thing, who just might be able to help them find Frank.

In Vegas for some much-needed QT, Harley struggles at the Strip's evilest hotel while a desperate lvy tries to secure tickets to Clayface's show.

When Harley and Ivy spot a seemingly sane Joker, they debate whether people can change at their core, revisiting a flashback about Harleen Quinzel's first day at Arkham Asylum.

Harley, Ivy and Sharon team up with Brainiac to save the universe from Lex and Lena's total domination.

Harley thinks the Legion of Doom is behind Ivy's capture and the tree monsters currently ravaging Gotham. But it's a trap!

In the season finale, Harley has her final showdown with the Joker, when [spoilers] [spoil] [spoilers]. Will they [spoiler]? Maybe. But you can bet they [spoiler]!