Christopher Lee character Prof. Sir Alexander Saxton
Peter Cushing character Dr. Wells
Telly Savalas character Captain Kazan
Alberto de Mendoza character Father Pujardov
Silvia Tortosa character Countess Irina Petrovska
Julio Peña character Inspector Mirov
Ángel del Pozo character Yevtushenko
Helga Liné character Natasha
Alice Reinheart character Miss Jones
José Jaspe character Conductor Koniev
George Rigaud character Count Maryan Petrovski
Víctor Israel character Luggage Worker
Faith Clift character American Passenger, Miss Bennett (uncredited)
Juan Olaguivel character Creature
Allen Russell character Captain O'Hagan
José Marco character Vorkin
José Canalejas character Russian Guard
Vicente Roca character Station Master
Hiroshi Kitatawa character Grashinski - the Locksmith (uncredited)
Barta Barri character First Telegraphist
Peter Beckman character Second Telegraphist (uncredited)
Allen Russell character Capt. O'Hagan (uncredited)
Fernando Villena character (uncredited)
