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Colonel March Investigates is a 1953 British film consisting of the three pilot episodes of the TV series Colonel March of Scotland Yard that were filmed in 1952, starring Boris Karloff. These episodes were "Hot Money", "Death in the Dressing Room" and "The New Invisible Man". Boris Karloff and his wife Evelyn sailed to England in July, 1952, where Karloff filmed three different pilot episodes of the Colonel March series to show to British TV executives. imdb.com