Magnum P.I. premiered in 1980 as an American detective series starring Tom Selleck as Thomas Magnum, a private investigator living in Hawaii. Its theme, composed by Mike Post and Pete Carpenter, became closely associated with the show's laid-back yet adventurous tone throughout its eight-season run. Decades later, the short, upbeat opening remains widely recognised from reruns, parodies and online edits, where it is often reused to give a modern clip an instant retro television feel.