Superintendent Graham

John Mills

Gillie

Hayley Mills

Korchinsky

Horst Buchholz

Anya

Yvonne Mitchell

Mrs. Phillips

Megs Jenkins

Barclay

Anthony Dawson

Detective Sgt. Harvey

George Selway

Dr. Das

Marne Maitland

Choirmaster

Kenneth Griffith

Christine

Shari

Poloma Captain

George Pastell

Police Constable George Williams

Meredith Edwards

Mrs. Williams

Marianne Stone

Poloma First Officer

Paul Stassino

Boy with Cap Gun

Michael Anderson Jr.

Mrs. Parry

Rachel Thomas

Dai Parry

Brian Hammond

Mr. Morgan

E. Eynon Evans

Mr. Morgan

Eynon Evans

Inspector Bridges

Christopher Rhodes

Detective Constable Thomas

Edward Cast

Desk Sergeant

David Davies

Bridegroom (uncredited)

Harry Baird

Seaman (uncredited)

Tom Bowman

Pub Customer (uncredited)

Jim Brady

Seaman (uncredited)

Peter Halliday

Detective at Police Station (uncredited)

Glyn Houston

Detective (uncredited)

John Howard

Mr Willis (uncredited)

Jack May

Man in Bar (uncredited)

Harry Phipps

Referee (uncredited)

Stan Simmons

Police Line-Up (uncredited)

John Wilder