Instead, it featured archival footage and interviews with people who knew the Kray twins, including:
* Ronnie and Reggie Kray: Though they are deceased, footage of them is used throughout the documentary.
* Frances Shea: The girlfriend of Reggie Kray, whose death was a key part of the Krays' story.
* Peter Allen: A former associate of the Krays.
* John "Mad" McVicar: A criminal who was known for his daring escape from prison.
While the film does not feature actors in the traditional sense, the real people featured in it make the documentary incredibly impactful and compelling.