[1] The film stars David Hayman and featured Jake D'Arcy, Sean Scanlan, Hector Nicol, Alex Norton and Fulton Mackay.

[2] It is based on the autobiography of Glasgow gangster Jimmy Boyle, who was reputed to be Scotland's most violent man.

[3] Due to non-co-operation by the Scottish Prison Service in allowing a film crew access to their property, Hayman's scenes in prison were filmed in Dublin's Kilmainham Jail.

Boyle repeatedly resisted attempts by the Prison Service to dampen his temper.

[5] He also assaulted many staff including a brutal attack causing an officer to lose his eye.