Henry Lincoln

Mervyn Haisman

H.P. Lovecraft

Gerry Levy

Jerry Sohl

Vernon Sewell

Christopher Lee

J.D. Morley

Michael Gough

Elder

Boris Karloff

Professor John Marsh

Barbara Steele

Lavinia Morley

Mark Eden

Robert Manning

Rupert Davies

The Vicar (uncredited)

Ron Pember

Petrol Attendant (uncredited)

Virginia Wetherell

Eve Morley

Roger Avon

Sergeant Tyson (uncredited)

Nita Lorraine

Woman with whip (uncredited)

Derek Barrington

Dirección de arte

Howard Lanning

Edición

John Coquillon

Dirección de fotografía

Tony Tenser

Produción executiva

Louis M. Heyward

Produción

Peter Knight

Composición de música orixinal

Michael Southgate

Deseño de vestiario

Betty Blattner

Maquillaxe

Ann Fordyce

Perruqueiro

Pauline Worden

Maquillaxe

Tigon British Film Productions

American International Pictures