Things are not what they seem in Fox's "Gotham." Season Two ended with a truckload of monstrous Indian Hill science experiments spilling out into Gotham City's general population, not least of which being Bruce Wayne's doppelganger. Now, word has come down that the Batman-in-training will meet said doppelganger, and that's where things get interesting.

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Actor ComicBook.com. The two characters are only similar in appearance -- despite being played by the same actor.

"Everything else about them, they think differently, they talk differently, they walk differently, they communicate differently," said Mazouz. "He's pretty weird, the other guy."

And lest you think Bruce and his double will operate separately throughout the season, Mazouz was quick to point out they'll share plenty of screen time. "I played both roles against myself more than once, and it was weird, really weird," said the actor. "You'll see!"

The third season of Gotham will also introduce the recast and aged up Poison Ivy, with Maggie Geha taking over for Clare Foley, and the potential for Bruce's relationship with future-Catwoman Selina Kyle to get kicked up a notch. Meanwhile, the Court of Owls will play a major role in the upcoming season, along with new villains like the Mad Hatter and the Tweedle brothers.

"Gotham" returns to Fox for its third season on September 19, 2016.