When young reporter and amateur biker Jerry Marsh investigates a mysterious hooded figure on a motorbike, he discovers crooks hiding out in a ruined castle with atomic sabotage on their minds...
as Jerry Marsh
as Mary Plack
as Robert Plack
as Martin Bremner
as George Amble
as Mrs. Marsh
as Rakoff
as Karen
as Ted Lintott
as Geoff Morgan
as Mario
as Rackton
as Landlord
as Elderly Lady
as Holiday-Maker
as Holiday-Maker's Wife
as Holiday-Maker's Son
as Joyce
as Van Driver
