Bruce Cabot

as Carl Beyersdorf / Ted Healey

Marta Labarr

as Freyda Healey

Tamara Desni

as Marie Dufreyne

Romilly Lunge

as Beverley Blake

Edward Lexy

as Det. Insp. William Barnard

Cyril Smith

as Det. Sgt. Trotter

Percy Walsh

as Otto Lemnel

Eve Lynd

as Florrie McGowan

Alexander Field

as Yorkie Meane

Hilary Pritchard

as Toni Vencini

Davina Whitehouse

as Mabel

Vincent Holman

as Hawker

Anthony Shaw

as Commander Anderson

Peter Gawthorne

as Sir John

Bernard Jukes

as Hubert Kessler

Nino Rossini

as Sammy

Rosarito

as Dancer

Ken Johnson

as And His West Indian Band

Frederick Valk

as German Ambassador