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Slim Callaghan, a fictional British private detective in the American "hard boiled" mode, was the central character in several popular Peter Cheyney novels, in a stage play by Gerald Verner, and in the 1948 movie programmer Uneasy Terms, which top-billed Michael Rennie. Meet Mr. Callaghan stars Derrick DeMarney, no stranger to detective films, in the title role. In this "pilot" for a proposed Callaghan movie series, Slim is required to solve the death of a much-hated rich man. Meet Mr. Callagahan made money (no surprise, since it cost practically nothing to make), but no sequels resulted. In the late 1950s, however, a French-made group of Slim Calaghan pictures went on the market, starring Eddie ("Lemmy Caution") Constantine.