This was originally intended to be an Alan Ladd starring vehicle.
According to the book "When the Snow Melts", the autobiography of producer Albert R. 'Cubby' Broccoli, this picture was one of three from Warwick Films which were "released within a year". The three movies were: 'The Man Inside' (1958), 'Killers of Kilimanjaro' (1959), and 'Tank Force!' aka 'No Time To Die' (1958).
Anthony Jacobs is dubbed.