Calvin Lockhart

as Tom Newcliffe

Peter Cushing

as Dr. Christopher Lundgren

Marlene Clark

as Caroline Newcliffe

Charles Gray

as Bennington

Anton Diffring

as Pavel

Ciaran Madden

as Davina Gilmore

Tom Chadbon

as Paul Foote

Michael Gambon

as Jan Jarmokowski

Sam Mansary

as Butler

Andrew Lodge

as Pilot

Carl Bohen

as 1st Hunter

Eric Carte

as 2nd Hunter

Valentine Dyall

as Narrator (voice/ uncredited)

Annie Ross

as Caroline Newcliffe (uncredited/voice)