Sam Shepard plays Irish prison escapee Jo Bronco Bullfrog. Hiding out in a seamy section of London's East End, Bullfrog befriends a gang of teenagers. Looking for kicks, the kids team up with Bullfrog, but his notion of excitement proves too much for them. Some good scenes, backed by excellent location photography, do not mitigate some of the more foolish aspects of the storyline. Completed in 1970, Bronco Bullfrog was withheld from general release for nearly two years.
~ Hal Erickson, All Movie Guide