Last appearance of DC Jimmy Thorpe, played by Martyn Read. He appeared in 5 episodes. The first one being Jackpot (1975)
Del Baker who has an uncredited role as a Detective, also performed stunts in this episode and in the pilot Regan (1974), in which he also played Det. Sgt. Cowley. He also later appeared in Tomorrow Man (1976) as Flying Squad Officer-uncredited, Messenger of the Gods (1978) as Sid, and in Sweeney! (1977) as Johnson's Hitman-uncredited.
This edition was second in the charts with an audience of 7.1 million under the JICTAR Ratings System.