Stephen Graham's chilling transformation for Apple TV's 'Nocturne'
The actor talks physical training, meditation and true-crime research to play a serial killer
Stephen Graham brings menace to Apple TV's new thriller Nocturne, where he plays serial killer Jurek Walter. The actor underwent a physical transformation, using pull-ups and press-ups, and adopted a meditative stillness to embody the character, who torments a small-town police detective from an underground concrete cell.