Incomprehensible plot. Scenes where the dialog reverts capriciously from English to Italian with no subtitles, even during a scene that supposedly took place in Ohio! Our hero, Charles Bronson's character Jeff, gets shot up in an ambush, shooting three would be assassins somewhere in the Caribbean, yet ends up in an Italian prison, where he and two fellow prisoners are menaced by a Black Tarantula spider, which of course is not found anywhere in Europe. This movie almost, but not quite, attains a ''so good it's bad'' status. Jill Ireland was pretty sexy doing very brief nudes scenes, which gave this movie at least some saving grace. Overall though, pretty much a waste of time.