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...

Jimmy Hanley
as Jerry Marsh

Rona Anderson
as Mary Plack

Leslie Dwyer
as Robert Plack

Lionel Jeffries
as Martin Bremner

Kenneth Connor
as George Amble

Beatrice Varley
as Mrs. Marsh

Michael Golden
as Rakoff

Valerie Hanson
as Karen

Vincent Ball
as Ted Lintott

Edwin Richfield
as Geoff Morgan
CinemaSerf
This is actually quite a fun story that is rather let down by a really mediocre cast. "Jerry Marsh" (Jimmy Hanley) is a local journalist with a penchant for motor bikes. When, one night, he spots a mysterious rider near the beach, he is intrigued and together with Rona Anderson ("Mary") and his edit...