Thunder Rock by Robert Ardrey Cast: Streeter - Edgar Whitehouse Nonny - James Nason Inspector Flanning - Patrick Duffy Charleston - Anthony Farmer Captain Joshua - Harry Andrew Briggs - Ernest Boak Dr Stefan Kurtz - Jack Gracey Melanie Kurtz - Sheila Robbins Anne Marie - Gina Altree. Miss Kirby - Mary Manners Director - Sheila Robbins Designer - Tony Farmer