Fox’s Gotham season four episode 17 found Jerome gathering together his supervillain buddies and revealed Jerome has a twin brother – Jeremiah – who it turns out once worked for the Waynes. Introducing Jeremiah as Jerome’s twin brother, and with Jerome delivering the classic “one bad day” line, seems to indicate Fox’s Gotham has finally introduced the Joker. The surprise twist not only gives the show its Joker but also allows Cameron Monaghan to continue to play the role which has become a fan favorite. Additionally, the episode brought the Joker Venom into play thanks to Scarecrow.
Up next, season four episode 18 airing on April 12, 2018 at 8pm ET/PT. The episode titled “That’s Entertainment” features guest stars David W. Thompson as Scarecrow, Benedict Samuel as Jervis Tetch, Cameron Monaghan as Jerome Valeska, Michelle Veintimilla as Firefly, Nathan Darrow as Mr. Freeze, Shiva Kalaiselvan as Lelia, and Peter McRobbie as Mayor Holden Pritchard.
Season four’s main cast features Ben McKenzie as Detective James Gordon, Donal Logue as Harvey Bullock, David Mazouz as Bruce Wayne, Morena Baccarin as Leslie Thompkins, Sean Pertwee as Alfred, Robin Lord Taylor as The Penguin, Erin Richards as Barbara Kean, Camren Bicondova as Selina Kyle/the future Catwoman, Cory Michael Smith as Edward Nygma/the Riddler, Jessica Lucas as Tabitha Galavan, Chris Chalk as Lucius Fox, Drew Powell as Butch Gilzean/Solomon Grundy, Alexander Siddig as Ra’s Ah Ghul, and Crystal Reed as Sofia Falcone.
The “That’s Entertainment” Plot: The Arkham inmates are still running freely in Gotham and they’re only getting more difficult to catch. Gordon develops a plan, but reluctantly has to turn to Bruce for help. Meanwhile, Barbara finds out just how far her new friends are willing to go for her in the all-new “A Dark Knight: That’s Entertainment” episode.