Stewart Granger as John Brent

Haya Harareet as Nicole Brent

Bernard Lee as D.S. Frank Hanbury

Hugh Burden as Charles Standish

Lee Montague as D.I. Tom Henderson

Melissa Stribling as Helen Standish

Conrad Phillips as Dr. Alan Richford

John Lee as Clive Lang

Norman Bird as Ralph Beldon

Peter Illing as Strakarios

Basil Dignam as Lyle

William Fox as Brinton