Cast
Jack McNaughton
Benson - Scotland Yard man
Victor Maddern
Anarchist (uncredited)
Patric Doonan
George Ellis
Tony Quinn
Chemistry lecturer (uncredited)
Ian Wilson
Glass collector (uncredited)
André Morell
Supt. Folland
Anthony Nicholls
Grant Mansfield
Douglas Ives
Mr Mathews - Union Rep (uncredited)
Anthony Bushell
Maj. Elliott
Bruce Seton
(uncredited)
Michael Ward
Music Club member (uncredited)
Mary Morris
Anna Braun
Glyn Houston
Railway shunter (uncredited)
Moultrie Kelsall
Ship's Captain (uncredited)
Julian Somers
Scottish Police Sergeant (uncredited)
Richard Massingham
Music Society member (uncredited)
Harry Fowler
Street photographer (uncredited)
Harry Locke
Andy - Telephone engineer (uncredited)
Joan Hickson
Mrs. Ellis
John Bailey
Stringer
Peter Jones
Announcer at Music Club (uncredited)
Julien Mitchell
Mr Philips - Union Rep (uncredited)
Lockwood West
Home Secretary (uncredited)
Dandy Nichols
Woman scrubbing porch step (uncredited)
Liam Redmond
Cmdr. Robert Brennan
Dora Bryan
Mrs. Bowers
John Harvey
Scotland Yard Man
Julian Amyes
Slater
Alfie Bass
Albert Brewer (uncredited)
Everley Gregg
Mrs Finch-Harvey - Music Club member (uncredited)
Geoffrey Keen
Morgan Williams
Charles Lloyd Pack
Percy Ward
Kenneth Griffith
Jimmy Ellis
Laurence Naismith
Reginald Gordon-Wells
Sam Kydd
Sam - Printer (uncredited)
Jean Anderson
Woman in street (uncredited)
Marianne Stone
Alfie's Mother (uncredited)