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Action-Packed "Gotham" Promo Teases "You Ain't Seen Nothin' Yet"

Following "Gotham's" strong season premiere, Fox aired a promo for next week's installment -- an episode titled "Knock, Knock." And who exactly is knocking at the door? It looks like pretty much every bad guy in Gotham, all stirred up by the Galavan siblings (Jessica Lucas and James Frain). And then there's Cameron Monaghan's Jerome, a character that has definitely perfected what clearly sounds like a Joker laugh-howl.

You can check out our recap of last night's episode, "Damned If You Do" over on Spinoff.

"Gotham" continues its "Rise of the Villains" storyarc next Monday night on Fox.

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