John Drew Barrymore, aka 'John Barrymore Jr.', completed his final featured acting role in this 1974 television episode, a year before the birth of his daughter, 'Drew Barrymore'.
In this entry, the injured Caine loses the hat that he had been wearing since the original pilot. David Carradine later reported this was to signify the transition from David Chow to Kam Yuen as Kung Fu Technical Advisor.