With Folie à Deux hitting theaters and The Penguin streaming, now's a great time to catch up on all things Caped Crusader

The inmate follows Arthur's murderous footsteps, punctuating his punchline by shanking Arthur. As Arthur bleeds out on the floor, his killer begins laughing uncontrollably. Then, just out of focus in the background, we see him carve a smile into his face, an unmistakable nod to The Dark Knight 's Joker's scars. Oh, brother.

This article contains major spoilers for the ending of “Joker: Folie à Deux” now playing in theaters. Joaquin Phoenix dons his clown makeup once again in “Joker: Folie à Deux,” the follow-up to his Oscar-winning performance from 2019.