Frixos Constantine presents an Anglo-Soviet co-production by Poseidon Productions Ltd., England, Sovietfilm and Mosfilm, U.S.S.R ; written and directed by Emil Lotianou ; Western version supervised by Michael Powell
Burman/Dubcovsky/Cine, Planete Spots ; dirección, Daniel S. Burman ; libro cinematográfico, Daniel S. Burman con la colaboración de Pascual Massarelli ; productor ejecutivo, Diego Dubcovsky