Nocturne: Stephen Graham on Going Through Serial Killer BOOT CAMP With His WIFE (Exclusive)

Stephen Graham chats with ET's Emily Curl about his new series, 'Nocturne,' before it premieres Oct. 30 on Apple TV. The Emmy winner shares how his wife helped him get into the head of a serial killer, and reveals how he accidentally scared himself while in character on set. Stephen, who will be taking over Robert De Niro's role of Neil McCauley in 'Heat 2,' also shares his hopes for the long-awaited sequel.

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