It’s been almost a decade since Hannah Waddingham starred in Game of Thrones as Septa Unella, a devout follower of the Faith of the Seven that had taken control of King’s Landing in season five. Her character put Lena Headey’s Cersei Lannister through a series of public and private humiliations before Unella found herself on the receiving end. That punishment involved an intense waterboarding scene that still haunts Waddingham to this day.