La Police privée de Bulldog Drummond

John Howard

Captain Hugh 'Bulldog' Drummond

Heather Angel

Phyllis Clavering

H.B. Warner

Colonel Nielson

Reginald Denny

'Algy' Longworth

E. E. Clive

Tenny

Elizabeth Patterson

Aunt Blanche

Leo G. Carroll

Henry Seaton

Forrester Harvey

Professor Downie

Clyde Cook

Constable Hawkins

David Clyde

Constable Jenkins