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Men from Scotland Yard and military intelligence build a dossier on a sabotage ring.
as Cmdr. Robert Brennan
as Supt. Folland
as Jimmy Ellis
as Maj. Elliott
as Anna Braun
as Mrs. Ellis
as Grant Mansfield
as Morgan Williams
as Stringer
as George Ellis
as Mrs. Bowers
as Commissioner
as Scotland Yard Man
as Percy Ward
as Reginald Gordon-Wells
as Benson - Scotland Yard man
as Slater
as Albert Brewer (uncredited)
as Mrs Skinner (uncredited)
as Pier Superintendant (uncredited)
as Street photographer (uncredited)
as Mrs Finch-Harvey - Music Club member (uncredited)
as Detective (uncredited)
as Railway shunter (uncredited)
as Mr Mathews - Union Rep (uncredited)
as Ship's Captain (uncredited)
as Sam - Printer (uncredited)
as Anarchist (uncredited)
as Mr Philips - Union Rep (uncredited)
as Scottish Police Sergeant (uncredited)
as Alfie's Mother (uncredited)
as Inspector Hewitt (uncredited)
as Home Secretary (uncredited)
as (uncredited)
as Man Dining in Cafe (uncredited)
as Policeman Discovering Jimmy's Body (uncredited)
as Miss Laurie - Music Club member (uncredited)
as Woman in street (uncredited)
as Music Club member (uncredited)
as Ship's radio operator (uncredited)
as Anarchist (uncredited)
as Man serving in cafe (uncredited)
as Printer's assistant (uncredited)
as Police clerk (uncredited)
as Police Inspector (uncredited)
as Student exiting Tutorial College (uncredited)
as Announcer at Music Club (uncredited)
as Policeman (uncredited)
as Telephone engineer (uncredited)
as Andy - Telephone engineer (uncredited)
as Music Society member (uncredited)
as Woman scrubbing porch step (uncredited)
as Chemistry lecturer (uncredited)
as Power station worker (uncredited)
as Policeman at Records Office (uncredited)
as Student exiting Tutorial College (uncredited)
as Power station worker (uncredited)
as Music Club member (uncredited)
as Barman (uncredited)
as Glass collector (uncredited)
