Murray found his greatest fame as the new Number 1, later promoted to Lieutenant Commander in "The Navy Lark" on BBC Radio. His film debut was as the second police officer who interrupts an amorous Eliza and Freddy (Wendy Hiller and David Tree) in "Pygmalion" (1938). He was Gladstone to John Gielgud's Disraeli in "The Prime Minister" in 1941. He played Dr. Stephan Petrovitch in the 1943 Ealing war film "Undercover". Among his other larger film roles were Uncle Henry in "London Belongs to Me" (1948, heavily made-up to look several decades older) and the lead in Terence Fisher's "Four Sided Triangle" (1953). He once again appeared under heavy make-up as the elderly Dr Manette in "A Tale of Two Cities" (1958).