The Man Without Mercy was released in the year 1980。The Man Without Mercy is also called as The Octagon, Protector, Osmiobok, Octagon - hiljaiset tappajat, Octagon, Fureur du juste, Duelo final, A Fortaleza Secreta。

Scott's life is plagued by two kinds of flashbacks. First are the childhood memories of the rigorous training he and a friend endured under a martial arts master. The second is of a mission Scott went on that ended with him watching his friend get murdered. Scott later becomes drawn closer to a vicious crime ring known as The Octagon. As he gets closer to the truth, Scott learns that these may be the men that murdered his friend so long ago.

The Man Without Mercy actors and actresses include Aaron Norris, Art Hindle, Chuck Norris, Ernie Hudson, Gerald Okamura。