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)