“It wasn’t until we shot that final scene, I’m sitting face to face with Sacha Baron Cohen, where I’m like, ‘Oh, he said it,’ ” the actress tells TheWrap Note: This story contains spoilers from Marvel’s “Ironheart” Episode 6. It’s been years of conspiracy theories and grasping at possible clues, but Mephisto has finally entered the MCU, live and in person — er, in demon? He showed up in the “Ironheart” finale and apparently, not even series star Dominique Thorne knew it was going to be him