Geoffrey Lumsden
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Geoffrey Lumsden (26 December 1914 - 4 March 1984) was a British actor, best known for playing the part of Captain Square in Dad's Army.
He appeared in eight episodes - " Command Decision ", 1968, " A Stripe for Frazer ", 1969, " Under Fire ", 1969, " Don’t Forget the Diver ", 1970, " Fallen Idol ", 1970, " Battle of the Giants ", 1971, " A Brush with the Law ", 1972, and " Wake Up Walmington ", 1977.