His best roles he played in his career were the Victor Frankenstein, in the British horror movie "The Curse of Frankenstein" (1957), by Terence Fisher he plays of role brilliantly, Victor creates a monster in the attic of his castle. His other role was that of Doctor Van Helsing in "Dracula" (1958), in this movie he must fight Dracula. In these two movies he was accompanied by another great actor Christopher Lee. They formed a very successful duo, starring in dozens of Hammer movies as "The Hound of the Baskervilles" (1959), "The Mummy" (1959), "The Gorgon" (1964), "Dr. Terror's House of Horrors" (1965). They clashed again as Van Helsing and Dracula, in "Dracula A.D. 1972" (1972), and "The Satanic Rites of Dracula" (1974).