Shortly after releasing a short promo for the next episode of Gotham, Fox unveiled a full-length trailer for next Thursday's chapter, the ominously-titled "Ace Chemicals." Clocking in at over two minutes, the trailer showcases Bruce Wayne's long transformation into Batman, from the series' pilot to its most recent episodes, before Jeremiah performs a hostile takeover to become the star of the video.

The trailer examines Gotham as an origin story for not just the Dark Knight, but also for the Clown Prince of Crime, as it charts the long and twisted story of twin brothers Jerome and Jeremiah Valeska. But the promo isn't all about old footage from the series' past. No, it also offers plenty of scenes from next week's episode, starting with the revelation of just what it is exactly that Jeremiah plans to do with his Thomas and Martha Wayne body doubles.

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With his Wayne clones and an Alfred Pennyworth who appears to be under some sort of mind-control, it truly looks like Jeremiah will attempt to drive Bruce Wayne as mad as he is by making him relive the night of his parents' murder. But that's not all -- no, all of this will somehow lead to a fateful confrontation between Bruce and Jeremiah at ACE Chemicals, the location associated with the birth of the Joker.

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According to the episode description,

Gordon races to uncover the criminal element threatening to end talks of Gotham’s reunification with the mainland. A very-much-alive Jeremiah (guest star Cameron Monaghan) returns and organizes a twisted recreation of the murder of Bruce’s parents, with the help of Jervis Tetch aka Mad Hatter (guest star Benedict Samuel) in the all-new “Ace Chemicals” episode of GOTHAM airing Thursday, Feb. 21 (8:00-9:00 PM ET/PT) on FOX.

It's been revealed that actor Cameron Monaghan will play a third mysterious character in the series finale, an episode set in the future that is framed like a pilot for a Batman television show. It's widely assumed that Monaghan will finally get to play Gotham's official take on the Clown Prince of Crime, and this new trailer sure adds fuel to that green fire.

Airing Thursdays at 8 p.m. ET/PT on Fox, Gotham stars Ben McKenzie as James Gordon, Donal Logue as Harvey Bullock, David Mazouz as Bruce Wayne, Robin Lord Taylor as Penguin, Camren Bicondova as Selina Kyle, Erin Richards as Barbara Kean and Sean Pertwee as Alfred Pennyworth.