Bernard Bresslaw

Henry Jekyll / Teddy Hyde

Jon Pertwee

Victor Jekyll

Reginald Beckwith

Reginald

Maudie Edwards

Henrietta Jekyll

Richard Wattis

Barclay

Michael Ripper

Fish

David Lodge

Peewee

Michael Ward

Mark Pasco

John Harvey

Sergeant Barnes

Harold Goodwin

Benny

Norma Marla

Angel

Jess Conrad

Bimbo

Roger Avon

Reporter

Cyril Chamberlain

Police Sergeant

Robert Desmond

Dizzy

Alexander Doré

Shop Customer

Reginald Marsh

Reporter

Ian Wilson

Small Man

Lucy Griffiths

Cellist (uncredited)