Professor Mullins

Unknown

Sir Peregrine Prentiss

Lord Cranthorne

Governor

Emperor

Col. Forbes-Jones

Sir Peregrine Prentiss

Great Uncle James

Lord Quillington

Gerard Sefton

Eye Surgeon

Samuel Simpson

Dr. Mumford

Worplesden

Henry Parker

Sir Charles Portal

Desmond

Dr Douthwaite

Henry Alsop

Arnold Reece

Henry

Adm. Frobisher

The Headmaster

Thomas Leighton

Chief Police Inspector

Lieutenant Brotadac

Alderman

McKyle

Lord Hulton

Harry

Admiral Sir Michael Culme-Seymour

Superintendent Parry

Sir Christopher Japhet

Detective-Inspector

Gilbert Webb

Gloucester

Mr. Menant

Hon. George Keppel

Geoffrey Hainton

Sir Walter Crediton

Lieutenant Brotadac

Dawson

Red King

Red King

Red King

Lechat

Radio Announcer (voice) (uncredited)

2nd Officer

Radio Announcer

Police Constable West

Quetzl

Detective tailing Creasey (uncredited)

Man

Detective at Bank (uncredited)

Book