Calificación
Reparto

John Mills
Supt. Mike Halloran

Charles Coburn
Dr. John Fenner

Barbara Bates
Elizabeth Fenner

Derek Farr
Mark Roper

Alec McCowen
Peter Crowley (as Alec Mc Cowen)

Fay Compton
Mrs. Crowley

Geoffrey Keen
Charles Dixon

Margaretta Scott
Helen Dixon

Meredith Edwards
Police Sgt. Rogers

Harry Locke
Police Sgt. Beale

Raymond Huntley
Dr. Reese

Harry Fowler
Leslie (Bandleader)

Maureen Connell
Mary Roper

Magda Miller
Molly Stevens

Newton Blick
Asst. Commissioner Beckett

Oscar Quitak
David