The Unholy Four was originally titled Ciak Mull, L'Uomo Della Vendetta. It's one of those spaghetti westerns in which the heroes and heavies are virtually indistinguishable. Though the outlaw leader (played by George Eastman credited by his birth name Luigi Montefiore) is evil incarnate, he isn't much worse than the four mercenaries hunting him down. Stalwart John Ford-regular Woody Strode is given plenty of screen time, and he makes the most of it. Director Enzo Barboni was billed as "E. B. Clucher" in the American prints.