Behemoth, the Sea Monster

André Maranne as French Radio Officer (uncredited) Leigh Madison as Jean Trevethan John Turner as John Lloyd Lamble as Senior Admiral, at the Admiralty Patrick Jordan as Photo Lab Aide Neil Hallett as Dr. Sampson's Helicopter Pilot (uncredited) Derren Nesbitt as The Radar Operator, at the radar room (uncredited) Guy Standeven as Naval Officer in Situation Room (uncredited) Gene Evans as Steve Karnes André Morell as Prof. James Bickford Maurice Kaufmann as Mini Submarine Officer Alastair Hunter as Dr. C. A. Morris, the village doctor Jack MacGowran as Dr. Sampson, the paleontologist Howard Lang as Naval Commader, at the "Valkyrie" wreck (uncredited) Leonard Sachs as Dialogue Scientist at Conference (bit) Max Faulkner as PLA Radio Operator (uncredited)

Douglas Hickox Director Eugène Lourié Director, Screenplay, Production Design Willis H. O'Brien Special Effects, Visual Effects Desmond Davis Camera Operator