Batgirl and Supergirl Get Animated
"Girl's Night Out" debuted on October 17, 1998, as the twentieth episode of The New Batman Adventures. Featuring a story by Hilary J. Bader and direction by Curt Geda, the episode is the only Batman episode to have characters from another show (Livewire and Supergirl) invade his series. Much like last week's entry, "Knight Time," fans of this era really couldn't tell if this was officially a Batman or Superman episode, because both aired under the same banner on the WB.
The episode opens with Superman villainess Livewire being transported into Gotham City, with the hopes that an experimental treatment at GothCorp will cure her of her electrical powers. Not only does Livewire never make it to GothCorp, but within moments of escaping her transport truck, she's managed to subdue Batgirl, who's filling in for an out of town Batman.
Batman makes a call to Clark Kent's apartment, unaware his cousin Kara is housesitting while he's traveling. When Kara realizes that Gotham City is in danger and Batgirl needs her help, she dons her Supergirl disguise and flies to Gotham. Arriving just in time to rescue Batgirl from Livewire, the heroes soon lose the slippery villain, earning a lecture from the gruff Harvey Bullock.
Soon, Poison Ivy and Harley Quinn find their secret hideout (specifically their toaster) invaded by Livewire, who declares "Ladies, meet your edge!" The villains go on a crime spree inside a closed mall, their shopping montages interrupted by Batgirl and Supergirl. There's still too much time left in the episode for the villains to be captured, so they escape and celebrate at the Penguin's Iceberg Lounge. Irritated by his edict to behave, the ladies cause even more trouble. In-between these hijinks, Batgirl and Supergirl get to know each other, reflecting on what they have in common (overprotective male authority figures) and what they envy about each other (life out in the country versus the big city.) Their interactions are sweet, and even though we never really see these characters together again, it's conceivable they do become genuine friends.
Eventually, things come to a head at the Gotham Zoo, where Ivy uses her ability to control vegetation to create a living elephant topiary, one that somehow has the mass to subdue Supergirl. With Harley accidentally knocking herself out with her own spring-loaded boxing glove, and Livewire inadvertently setting Ivy's creations ablaze, the villains are soon defeated.
Back in Batgirl's apartment, the two heroines have a sleepover and celebrate their victory. They're enthusiastic about a news report that has Harvey Bullock declaring their potential as heroes...a scene that was initially conceived as a cute button for the episode, but would now likely find the producers in some amount of trouble. So, Batgirl and Supergirl are just desperate for this slob's approval, huh...?