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