It's true that it may not appeal to martial arts movie lovers across the board because it actually has quite an involved, twisty plot and is going to be too slowly paced for some. There's not much in the way of action until the big finish. Still, for an undemanding B action picture, this viewer found the production values to be reasonably good, and there are some fine performances among the supporting cast. What lends "The Octagon" a high amount of unintentional hilarity is Chuck's overdone internal dialogue, all done with an exaggerated echo effect.
Chuck stars as Scott James, a former fighter with bad memories, particularly of growing up with a hostile adoptive brother, Seikura (Tadashi Yamashita), who as an adult is now running a training camp for terrorists. A beautiful young heiress, Justine (Karen Carlson), wants revenge against Seikura because her father was one of Seikura's victims, and tries to hire Scott for her purposes. Scott isn't too happy that somebody would try to use him, and doesn't particularly want to get involved, but eventually realizes that he must.
This is boosted to a degree by the engaging presence of Lee Van Cleef, who's a gas as an anti-terrorism expert / old friend of Scott's. Art Hindle ("Black Christmas" '74, "Invasion of the Body Snatchers" '78) co-stars as Scott's buddy A.J., who makes a mistake in getting interested in a cause and gets in over his head. Sexy Carol Bagdasarian, daughter of composer / songwriter / actor Ross B., plays Aura, a terrorist-in-training who experiences a change of heart. Kim Lankford ("Malibu Beach") is likable during her brief screen time. B movie legend Richard Norton makes his film debut in two credited roles and several uncredited ones as faceless ninjas. (He's joked that he must have died a total of eight times in this movie.) And keep an eye out for people such as Brian Libby (whose next screen role was as Chuck's psycho nemesis in "Silent Rage"), Jack Carter, Ernie Hudson, Chuck's son Mike who plays Scott as a teenager, and an uncredited Tracey Walter.
Good production design (by James L. Schoppe), cinematography (by Michel Hugo), and music (by Dick Halligan) help to make this a decent if unexceptional bit of entertainment. Chuck, as always, fares much better when kicking ass than when simply acting, but he still makes for a formidable hero. And the snarling Yamashita is a worthy bad guy. Some viewers may be amused to note how brutal the violence is at times.
Overall, this is fun enough to watch.
Seven out of 10.
