The new episode of The Penguin features a flashback scene set in Arkham Asylum — and the prison uniforms and visiting room we see are both exactly the same ones we saw in The Batman, the 2022 Matt Reeves film that The Penguin spins out of. In these scenes Cristin Milioti’s character Sofia is referred to as “The Hangman” — which is the character’s name from the acclaimed DC Comics miniseries Batman: Dark Victory.