The film is based on the actual events of the Portland Spy Ring trial in the U.K. A disgruntled Navy Clerk is transferred to a secret research establishment and is subsequently black-mailed/paid by Czech intelligence to procure secrets for them. …
Bernard Lee,
William Sylvester,
Margaret Tyzack,
David Kossoff,
Nancy Nevinson,
Thorley Walters,
Gillian Lewis
Added on Netflix 2022-04-19.
Youtube Trailer