WARNING: The following article contains spoilers for this week's episode of Gotham, "13 Stitches," which aired Thursday on Fox.
When Shane West's Eduardo Dorrance debuted in Gotham's previous episode, "Pena Dura," he was swiftly revealed to viewers as the main threat of the series' final season. Dispatched by Secretary Walker to purge the criminal element from the forsaken Gotham City, Dorrance and his soldiers are tasked with restoring order, and killing anyone who stands in their way. However, Jim Gordon's one-time Army buddy was secretly behind Edward Nygma's destruction of Haven, which resulted in the deaths of hundreds of civilians.
As the former friends face off in this week's "13 Stitches," Dorrance is finally transformed into Bane, one of Batman's best-known villains, which was teased even before the season premiered.
Although Gordon in possession of the chip that once controlled Nygma, which can expose Walker's nefarious plans, Dorrance has Leslie Thompkins hostage. The two set up a trade, in the ruins of Haven, where the former friends start a brutal fight.
They don't pull any punches and, eventually, Gordon gains the upper hand, and Dorrance is impaled on a protruding steel rod, where he's left for dead. But, luckily for him, Secretary Walker chooses that time to reveal herself.
Thanks to Gordon, Bruce Wayne and others, Walker and Dorrance's plans are made public, forcing the secretary to go on the run. She rushes to Dorrance with a case containing the breathing mask seen in Gotham promos. When it's placed on Dorrance, he immediately regains some of his strength. Although he's in bad shape, Walker tells Dorrance that their accomplice Hugo Strange will help him, and then they will be ready to continue their work.
Although Walker doesn't reveal which chemical compound is contained within the mask's breathing tubes, it's a safe bet that it's the Venom toxin, first mentioned in Season 1. Back then, it was revealed as a product developed for the military to imbue soldiers with super-strength, which makes it likely Secretary Walker or her allies had access to the substance.
Dorrance may not have grown in size or strength yet, but it's bound to happen sooner rather than later.
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.