The Ringer

Patric Curwen

Dr. Lomond

Esmond Knight

John Lenley

John Longden

Inspector Wembury

Carol Goodner

Cora Ann Milton

Gordon Harker

Samuel Hackett

Franklin Dyall

Maurice Meister

Dorothy Bartlam

Mary Lenley

Henry Hallatt

Inspector Bliss

Arthur Stratton

Sgt. Carter

Kathleen Joyce

Gwenda Milton

Eric Stanley

Commissioner