Harry Lime (original British title The Adventures of Harry Lime) was an old-time radio program produced in London, England during the 1951 to 1952 season.

Orson Welles reprised his role of Harry Lime from the celebrated 1949 film adaptation of Graham Greene's novel The Third Man. The radio series is a "prequel" to the film, and depicts the many misadventures of con-artist Lime in a somewhat lighter tone than the character's villainy in the film.

Most episodes would begin with "The Third Man Theme" being played, abruptly cut off by an echoing gunshot. Then Welles would speak: "That was the shot that killed Harry Lime. He died in a sewer beneath Vienna, as those of you know who saw the movie The Third Man. Yes, that was the end of Harry Lime ... but it was not the beginning. Harry Lime had many lives ... and I can recount all of them. How do I know? Very simple. Because my name is Harry Lime."