John Saxon's fake mustache changes lengths in the final fight scene. Before the fight, it's much longer on the left side on his face, during the fight that side shortens until it's even and then unbalanced to the right later in the fight.
John Saxon's stuntman is visible during the final fight scene on the hill. For a very short moment, when the camera is following the fast fight, you can see him leaning against a tree with his legs crossed.
In closeups, Philip Ahn's (Master Kan) prosthetic makeup to make him appear bald is easily seen.
When Raven throws the chains toward Caine they land just in front of his feet. When Caine picks them up they are behind his feet.