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.

Joker: Folie à Deux is the concluding chapter of the story of Arthur Fleck (Joaquin Phoenix), and the movie features an ending that is definitive. However, the final scene has drawn a wide range of reactions from viewers,