Last night's 2017 "Gotham" premiere episode kickstarted Jerome's highly anticipated return to the series. And once the proto-Joker is back to his old self running amok in Gotham, he might get a partner-in-crime. Yep, "Gotham's" version of Harley Quinn is most likely debuting in the show's currently airing third season -- and now we know when she might show up, too.

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"Gotham" executive producer John Stephens talked about the possibility of seeing proto-Harley in a post-premiere interview with TV Guide. "We might see [her] in Episode 22," said Stephens, targeting the tail-end of season three for Harley Quinn's potential debut. His comments also indicated that Harley Quinn's introduction will be the "launching point" for season four. While details remain scarce about her arrival or how "Gotham," which is set in the decades before Bruce Wayne becomes Batman, will adapt the character, Stephens promises, "It's crazy."

This isn't the first time Harley Quinn has been teased for "Gotham." Stephens previously talked about including both Killer Croc and Harley Quinn in the show back before the start of season three in August 2016. While Stephens hinted that Croc would show up early in season three (that still hasn't happened yet), he then said “the Harley Quinn of it all is a bit more of a sticky wicket but it’s one we’ve already thought about for the character. We don’t want to give too much away but it will definitely be someone connected to the Joker cult world that we have set up. But it’s down the road, later in Season 3 right now.” Stephens' new comments nail down "later" to "episode 22."

Starring Ben McKenzie as Detective Jim Gordon, "Gotham" airs Mondays at 8 pm ET/PT on Fox. The series also stars David Mazouz as young Bruce Wayne, Camren Bicondova as young Selina Kyle, Donal Logue as Harvey Bullock, Robin Lord Taylor as Oswald Cobblepot, Morena Baccarin as Leslie Thompkins, Jada Pinkett Smith as Fish Mooney and more.