The Octagon (1980) is a Adventure, Action, Thriller film that follows scott James, a veteran martial arts expert, is recruited as the protector of the wealthy and beautiful Justine after she becomes the target of a ninja clan. When Scott finds out that his ruthless arch-nemesis, McCarn , is involved with the stealthy and dangerous criminals, he is eager to settle old scores. Soon Scott is facing off against McCarn and the entire ninja horde in an effort to take them all down. Currently, you can watch The Octagon on Amazon Prime Video, fuboTV, MGM+ Amazon Channel, MGM Plus Roku Premium Channel. Streaming availability may vary by country and platform over time. It has a user rating of 5.0 out of 10 from 151 votes. Fans of adventure movies may also want to explore similar titles below.