Brianne Murphy (Bri in the credits) as Pam Mitch Evans (aka Evan Hayworth) as the Gorilla Chuck Niles as Ivan the Zombie Paul Pepper as Skip J.L.D. Morrison as Brandt Mitzie Albertson as Julie Jay Hawk as Morrie Mike Concannon as Sheriff Nan Green as Dotty Don Neeley as Maj. Coleman Production Actress Katharine Victor said Jerry Warren "discovered" her when they met by chance as he was preparing Teenage Zombies in mid-1957. She was surprised that he gave her almost no directorial help while they were making the film. Evan Hayworth (listed in the cast as Mitch Evans) said he played the gorilla wearing a cheap rental costume. Famed L.A. disc jockey Chuck Niles appeared as Ivan the Zombie in the film. He later said ""I was just walking around like Frankenstein, that's all, no lines, just 'gluergugluergu,' and I'm pretty good at that.....the movie was just terrible". Bruce Eder of Rovi wrote that lead actor Don Sullivan also appeared in two other 1950's cult films, The Giant Gila Monster and The Monster of Piedras Blancas. The film's poster promised "Young Pawns Thrust into Pulsating Cages of Horror in a Sadistic Experiment", but film historian Bill Warren said "It's doubtful anyone expected much more than the dreck they got....it's not just bad, it's terrible". Release While the American Film Institute states that the film was released in April 1960 at the same time as The Incredible Petrified World, Bill Warren in his book Keep Watching the Skies states that the film was released in December, 1959 on a double bill with The Incredible Petrified World. References External links 1960 films 1960 horror films 1960s science fiction horror films American black-and-white films American independent films American science fiction horror films American zombie films Films directed by Jerry Warren Films set on islands Mad scientist films 1960 independent films 1960s English-language films 1950s English-language films 1950s American films 1960s American films