"Greedy sailors capture a giant lizard off the coast of Ireland and sell it to a London circus. Then its mother shows up."
Bill Travers
as Joe Ryan
William Sylvester
as Sam Slade
Vincent Winter
as Sean
Christopher Rhodes
as McCartin
Joseph O'Conor
as Prof. Hendricks
Bruce Seton
as Prof. Flaherty
Martin Benson
as Dorkin
Maurice Kaufmann
as Radio Reporter
Basil Dignam
as Admiral Brooks
Barry Keegan
as Mate
Tommy Duggan
as First Naval Officer
Howard Lang
as First Colonel
Dervis Ward
as Bosun
Mick Dillon
as Gorgo
Nigel Green
as Bulletin Announcer (Uncredited)
Daniel James
Screenstory
Robert L. Richards
Eugène Lourié
Director
Screenplay
Wilfred Eades
Producer
James Leicester
Associate Producer
Maurice King
Executive Producer
Herman King
Eric Boyd-Perkins
Editor
Tom Howard
Visual Effects
Frank King
Stella Morris
Makeup Artist
Angelo Francesco Lavagnino
Original Music Composer
Freddie Young
Director of Photography
Elliot Scott
Art Direction
Roy Gough
Still Photographer