Dana AndrewsDr. John Holden

Peggy CumminsJoanna Harrington

Niall MacGinnisDr. Julian Karswell

Athene SeylerMrs. Karswell

Liam RedmondProfessor Mark O'Brien

Peter ElliottProfessor K.T. Kumar

Ewan RobertsLloyd Williamson

Reginald BeckwithMr. Meek

Rosamund GreenwoodMrs. Meek

Brian WildeRand Hobart

Maurice DenhamProfessor Henry Harrington

Richard LeechInspector Mottrarn

Lloyd LambleDetective Simmons

Peter HobbesSuperintendent

Charles Lloyd PackChemist

John SalewLibrarian

Janet BarrowMrs. Hobart

Percy HerbertFarmer

Lynn TracyAir Hostess

John HarveyHobart's Brother

Alan Beaton

Hyma Beckley

Ballard Berkeley

Ernest Blyth

Wallace Bosco

Daniel Brown

Jimmy Cains

George Curtis

Richard Duke

Shay Gorman

Laurence Hepworth

Walter Horsbrugh

Arthur Howell

Anthony John

Dan Lester

Leonard Llewellyn

Michael Peake

Paul Phillips

Anthony Richmond

Peggy Scott Sanders

Terry Sartain

Leonard Sharp

Bert Simms

Robert Brooks Turner

Jacques TourneurDirector

Charles BennettScreenplay

Hal E. ChesterScreenplay

M.R. JamesStory

Frank BevisProducer