The grand finale fight for this movie was shot on-location at Castle Kashan in Malibu, California. Sometimes known as "Hodge Castle" or "Malibu Castle". The ten thousand square-foot replica of a Scottish castle was also used for filming Highway to Heaven (1984). A few months after this movie wrapped, the castle was completely destroyed by a wild fire.
Martin Kove (Sonny Cool) accepted his role on the condition that the original screenplay be toned down and made less violent.
Spice Williams-Crosby was originally cast as a fighter, but was re-cast as a referee, before finally securing the part of the protagonist's trainer.
The role of Flame was considerably re-written for Spice Williams-Crosby. The character was originally a more stereotypical Asian Martial Arts Master.