“Dolores wanted to save the world too….we started in the same place. I can see the error of the path she took. You’re right, William, you are going to save the world. For us,” Hales tells him…and then a robo version of MIB’s cowboy appears. Both MIBs duke it out, the robo one telling the other that the guy in the park was actually real. Robo MIB cuts the throat of human MIB, and says, “Welcome to the end, William,” before a parting Season 3 shot of several host processing machines.

— ‘Westworld’ Season 3 Finale: We Finally Get Our Answer About The Man In Black In A Dolores-Led Revolution