While Fox's "Gotham" has introduced young versions of many of Batman's most notorious villains, there's one that has yet to make an appearance -- or has he? Batman's most famous villain, the Joker, doesn't have a regular role on the show like Penguin, Riddler or Catwoman. "Gotham" instead introduced Jerome (Cameron Monaghan), a young man possessed of loose morals and a potentially iconic cackle. Jerome died early in season two, stabbed in the back by Theo Galavan after making a name for himself as one of Gotham City's most notable villains. His death even inspired a number of copycats.

Now, as the trailer for "Gotham's" 2017 return teases, Jerome stands poised to return. It turns out the potential Joker might not be as dead as previously thought. When "Gotham" returns in January, Gordon and Bullock might have a major problem on their hand -- and that's no joke.

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.