John Harvey

as Professor Brett

as Inspector Loomis (uncredited)

as Hobart's Brother

as Minister Palmer

as Commissionaire

as Police Sergeant

as Sgt. Vickers

as Maj. Cartwright

as Sergeant (Bridge Hotel)

as Club Receptionist

as Rockhampton Prison Governor

as Bill Trethowan

as Man in Bookshop

as Sergeant at Police Station (uncredited)

as Thompson

as Reinhardt Klermer

as Fingerprint Officer

as Station Warrant Officer

as Charles

as Burns (uncredited)

as Supt. Macrea

as Wilson, Prison Officer

as Prefect

as Wallace

as Sgt. Grey

as Doctor

as Tommy Dooley

as Lieutenant

as Mack (uncredited)

as Buster Cox

as Burns

as Police Sergeant (uncredited)

as Scotland Yard Man

as Bland

as Wade

as Kenneth Peters

as (uncredited)

as Professor Brett

as Freddie

as Dr Springveldt

as Maj. Maggoury

as Johnnie

as Sir Charles Gray

as Sergeant Barnes

as Major Henderson

as Det. Insp. Roberts

as Sir John Reith

as Andrews

as Hammond Stubbs

as Ted Warren

as Officia

as Lawyer Fred Knox

as Colonel Dewhurst

as Inspector Armstrong

as Dr. Ingrams

as Chief Supt. Griffin

as Mr Wilkinson

as Signals officer

as Dr. Wallace

as Eddie Steele

as First Officer

as Richard Arnold

as Sir William Duffy

as Sir Tamerton Foliott

as Alan Hartley

as Sir Alfred Page

as Cpl. McCunn

as Sir John Forster

as Que

as Cmdr. William Harbison

as Public Health Inspector

as Borden

as Nigel