Colin Firth Transforms Into The Staircase’s Michael Peterson

But Campos said that it was the perfect way to depict the perplexing nature of the case, which is considered solved despite an abundance of outstanding theories. “The things you could never imagine that she does in the moment really surprise you—you go, oh, my God, maybe it was that,” he said. “Or that. Or that must have been what it was like for her to be in that stairwell by herself.”

Michael Stuhlbarg, Juliette Binoche, Dane DeHaan, Olivia DeJonge, Rosemarie DeWitt, Tim Guinee, Patrick Schwarzenegger, Sophie Turner, Vincent Vermignon, Odessa Young and Parker Posey also star in the chilling series. 

The first three episodes, written and executive produced by Campos and co-showrunner Maggie Cohn, premiere May 5 on HBO Max.