The film was refused a UK cinema certificate in 1977 by the BBFC.
John Steiner revealed in an interview on a DVD release of this film that during the shooting of one scene involving numerous nude actresses that the crew members and assorted onlookers were more transfixed by his SS uniform than they were by the naked women.
Rino Di Silvestro did extensive research on all the badges and uniforms worn by both the Nazi officers and the prisoners in the concentration camp.
All the interiors for the prison camp were filmed at Bracciano Castle in Bracciano, Rome, Lazio, Italy.