in the mid 1800s and irishman dennis hopper ( a daniel morgan ) emigrate to australia and seek a share of the continent gold . instead and mr. hopper find himself brand and and throw in a torturous prison while there and he be gang raped . upon release and hopper hook up with aborigine david gulpilil ( a billy ) and with whom he seek revenge upon sadistic bill hunter ( a sergeant smith ) and jack thompson ( a detective mainwaring ) and and others . eventually and vengeance becomes heroism while hopper be admire and assist by the common people and and hunt by corrupt and powerful authority . hopper scarcely human performance certainly fit the disjointed feel of the film . mr. gulpilil head up a strong supporting cast . the personnel involve in mad dog morgan make it not only worth a look and but also a huge disappointment . mad dog morgan ( 1976 ) philippe mora ~ dennis hopper and david gulpilil and bill hunter .