Born in
Vienna,
Austria-Hungary, he was the son of actor and
operetta singer Sigmund Natzler. He was a cousin of actresses and singers
Grete Natzler and
Hertha Natzler. As a young man he performed at second-rate Vienna theatres and from the 1930s in several
cabarets in
Paris. After
World War II he worked for the
German language service of the
BBC. Nalder is perhaps best remembered for his roles as an assassin in
Alfred Hitchcock's 1956 remake of
The Man Who Knew Too Much, the vampire
Kurt Barlow in the 1979
television adaptation of the
Stephen King novel ''
Salem's Lot, and the Andorian ambassador Shras in the Star Trek'' episode "
Journey to Babel". Nalder appeared, at the request of star
Frank Sinatra, in a brief, uncredited role as a communist spymaster named Dmitri in
John Frankenheimer's 1962 film
The Manchurian Candidate. He also had a brief role in the 1981 Walt Disney film
The Devil and Max Devlin but later stated in an interview that he could not stand working with its star
Bill Cosby, who he described as "a pig", as well as "rude, arrogant, and very untalented." Nalder's television work also included episodes of the series
77 Sunset Strip,
It Takes a Thief,
Surfside Six,
Boris Karloff's
Thriller ("The Terror in Teakwood" and "The Return of Andrew Bentley"),
McCloud and
I Spy. Nalder was also credited as "Detlef Van Berg" in the
X rated films
Dracula Sucks (1978) and
Blue Ice (1985), but performed in no scenes of a pornographic nature. ==Death==