"Lupin III: Secret File" is actually a compilation of two previously unreleased pilot films; original Cinemascope version from year 1969 and restyled, and redubbed TV version from year 1971. As well as four film trailers. The trailers are for the first four Lupin films: "Lupin vs. the Clone", "Castle of Cagliostro", "Legend of the Gold of Babylon" and "The Fuma Conspiracy". Later in 1989 "Lupin III: Secret File 2 - Sound Collection" was released consisting of openings and endings of all previous Lupin series and theme songs.