No, not that Harold Lang!
There are several other relatively well-known performers
with the name "Harold Lang"...
Harold Lang: British drama instructor and film actor (Quatermass Xperiment)
Born: 1922 / Died: 1971
Other Selected Films:
1969 - Two Gentlemen Sharing (Character played: Young Man)
1966 - The Psychopath (Character played: Briggs)
1965 - Dr. Terror's House of Horrors (Character played: Shine)
1963 - West 11 (Character played: Silent)
1963 - Paranoiac (Character played: RAF Type)
Performed With: Michael Caine, Bill Travers, Stanley Baker, Maurice Evans, Jack Hawkins,
Virginia McKenna, Robert Preston, Paul Scofield, Billie Whitelaw, Theodore Bikel
Theatre World - June 1961
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Harold Lang: popular vocalist of the 1920s
("Harold Lang" may be a pseudonym for vocalist Scrappy Lambert)
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Other Harold Langs: a mid-20th century German actor of Passion plays, an American historical
author, a jazz sax player, etc.