Ring of Spies (1964)
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. He seduces the secretary who controls the most secret documents, and they enjoy the fruits of their treachery until the British authorities begin to close in on them.
                                    Directing:
                    
Writing:
Stars:
        - Robert Tronson
 
Writing:
- Peter Barnes
 - Frank Launder
 
Stars:
        
                            Release Date: 1964-03-23
            
                        
                                
                                        
                    
                    6.9/10
                    
                                
                            
            
    
                    
                    6.9/10
                    - Country: GB
 - Language: English
 - Runtime: 90
 
                                    
                                    Cmdr. Winters
                                                                            
                                    
                                    Henry Houghton
                                                                            
                                    
                                    Gordon Lonsdale
                                                                            
                                    
                                    Captain Ray
                                                                            
                                    
                                    Elizabeth Gee
                                                                            
                                    
                                    Peter Kroger
                                                                            
                                    
                                    Helen Kroger
                                                                            
                                    
                                    Anderson
                                                                            
                                    
                                    Captain Warner
                                                                            
                                    
                                    Chief Supt. Croft
                                                                            
                                    
                                    Johnnie (uncredited)
                                                                            
                                    
                                    Colonel Monat (uncredited)
                                                                            
                                    
                                    Police Officer (uncredited)
                                                                            
                                    
                                    Secondary Supporting Role (uncredited)
                                                                            
                                    
                                    Surveillance Man (uncredited)
                                                                            
                                    
                                    First Member at Lords (uncredited)
                                                                            
                                    
                                    Second Member at Lords (uncredited)
                                                                            
                                    
                                    Portland Official (uncredited)
                                                                            
                                    
                                    News Vendor (uncredited)