Filmed entirely in the studio over the period of five weeks.
Columbia asked Hammer to edit out numerous uses of the word "bastard" for its American release.
Gordon Jackson (Sgt. McKenzie) and Burt Kwouk (Japanese Soldier) reprised their role from the original television version Yesterday's Enemy (1958).
The film was nominated for four BAFTA awards.
Stanley Baker regarded this as one of his best films, although he regretted they did not have a larger budget.