Norma Marla is an actress, best known for 'The Ugly Duckling' and as a model who toured the United States promoting the Hammer movie, The Mummy, even though she was not in that film.
After a series of scientific experiments directed towards freeing the inner man and controlling human personalities, the kindly, generous Dr Henry Jekyll succeeds in freeing his own alter ego, Edward Hyde, a sadistic, evil creature whose pleasure is murder.
Henry Jekyll was always the outsider, a bungling and awkward buffoon, relegated to waiting for his invitation to participate in life that never arrived: until he discovers a medical formula developed by a dead uncle, which claimed to turn 'a man of timid disposition into a bold, fearless dragon'. Taking a draught of the elixir Henry is transformed into suave, sophisticated and highly desirable Teddy Hyde. Armed with his new persona, Teddy is ready to face the world; but is Henry ready for the consequences?