Jim Craig was originally cast as both the Master Killer and the Old Man, but the roles were split up when Jim was hurt in a motorcycle crash. Director Sean O'Grady ended up playing the Master Killer in all of the movie but the wide shots at the waterfall. David Loftus was recast as the Old Man. Jim plays the Old Man during the initial meeting with the Pupil and fight while David plays the Old Man during the training montage.