Harley Quinn

In the series premiere, Harley Quinn is fed up being the Joker's sidekick and strikes out on her own - determined to become the criminal Queenpin of Gotham City.

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 (LAKE BELL). Will she succeed, or be humiliated in the process?

Realizing that she needs a crew to pull off legit heists that will attract the Legion of Doom's attention, Harley attempts to recruit disgraced Wonder Woman villain, Dr. Psycho (TONY HALE) and Clayface (ALAN TUDYK), Gotham's shapeshifting thespian extraordinaire.

Now that she's got a crew - including newest member King Shark (RON FUNCHES) - up-and-coming supervillain Harley Quinn needs a nemesis. Although she goes after Gotham's big fish, Batman (DIEDRICH BADER), she ends up with an adolescent Robin (JACOB TREMBLAY), making her the laughing stock of the criminal underworld.

While trying to find a lair to house her crew, Harley suffers a (literally) paralyzing identity crisis. With the aid of Dr. Psycho's telepathic powers, the crew must enter Harley's mind to free her from her paralysis, leading to a high-stakes escape from the twisted psyche of a bona fide psycho.

During a heist gone wrong (thanks to Harley's impetuousness), Clayface loses an arm - which turns out to be evidence to enterprising GCPD Commissioner Jim Gordon (CHRISTOPHER MELONI), but also a key witness against Harley and her crew. Will the sentient arm turn State's witness before Harley and company can rescue him from Gordon?!

Desperate for her crew to have some "evil oomph," Harley breaks the Queen of Fables (WANDA SYKES) out of prison - only to find that the storybook-themed villain is maybe a little TOO evil for her tastes. Now, Harley has to extricate herself from Fables without leading to the destruction of her crew.

Harley gets an invite to the Legion of Doom's prospective members party, but Ivy discovers that it's Lex Luthor (GIANCARLO ESPOSITO) they're really after. Will this cause a rift between the two besties?

After becoming a newly minted member of the Legion of Doom, Harley naturally finds she must spend time with The Joker (ALAN TUDYK). Now that they're equals, will Harley backslide into her old toxic relationship with Gotham's Clown Prince of Crime?

After a falling out with her crew, Harley heads back home to Bensonhurst, where her doting mother waits for her...and her deadbeat dad, who's more dangerous than anticipated.

Harley must rescue Ivy from the clutches of Scarecrow (RAHUL KOHLI), who's trying to harvest her pheromones to make a super toxin that turns plants into sentient monsters.

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]!