Lupin the 3rd: The Mystery of Mamo

The Mystery of Mamo (ルパン三世ルパンVS複製人間, Rupan Sansei: Rupan tai Fukusei Ningen) is a Japanese animated film made in 1978 under the direction of Soji Yoshikawa. Originally released under the title of Lupin III (ルパン三世, Rupan Sansei), it was the first film that was made based on the story of the character Arsène Lupin III, created by Monkey Punch. The film's plot follows master thief Arséne Lupin III and his attempts to foil Mamo, a wealthy and powerful recluse, and his bid for immortality.

Dubbing History
Around the time of the film's original release, an English dub of the film was produced by Frontier Enterprises, commissioned by Toho. This dub was made with the intention of being shown on Japan Airlines Flights, and was also available from the Los Angeles branch of Toho for booking to play at local theaters. This version has no credits for the voice cast on any known prints and as such, the full cast has yet to be verified. Goemon is known to have been voiced by Frontier Enterprises owner William Ross, while Zenigata was voiced by Tokyo-based writer Greg Starr, a role he "doesn’t remember much about". Lupin is also known to have been voiced by Tom Clark, as mentioned on his talent agency. This dub is the most faithful to the original Japanese script, though most of the names were changed to Western-sounding alternatives.

Due to licensing issues with TMS Entertainment (which owns the rights to the film, but not the dub), the Toho dub could not be released commercially. This prompted Carl Macek of Streamline Pictures to create a new dub of the movie, using the same cast used to previously dub The Castle of Cagliostro. This dub was released on VHS in April of 1995. Loosely based on the Toho dub and its script, this adaptation made various alterations to the film's original dialogue. This was also the first and only dub of the franchise produced by Streamline in which Lupin is consistently referred to by name: due to concerns of a possible legal dispute with the estate of Maurice Leblanc (the creator of the original Arsène Lupin), he was referred to in their dub of Cagliostro as "The Wolf", while their dub of episodes 145 and 155 of Lupin the 3rd Part II alternate between the two names.

A third dub, produced by Manga Entertainment UK was made the following year for the PAL market under the title of The Secret of Mamo and released on July 8, 1996. The main reasoning behind the creation of this dub was due to the aforementioned possibility of a dispute with the Leblanc estate, and thus this dub changes Lupin's name to "Wolf III". The script was also based on that of the Toho dub.

The fourth dub was produced by Phuuz Entertainment for Pioneer Entertainment was released on DVD on July 29, 2003, using a new anamorphic print taken from the Japanese DVD. This dub, which was also titled The Secret of Mamo, utilized the cast for the second TV Series that was then currently being dubbed. Similar to their dub of the series, the Phuuz/Pioneer dub of the movie took a liberal approach to adapting the original Japanese dialogue, with the script incorporating 21st century pop culture references and additional profanity. Due to music licensing issues, the film's ending theme, "Lupin Ondo", was replaced with an extended reprise of the title theme "Lupin III '79".

All four dubs of the movie are included on the 2013 DVD release by Discotek Media. Both the Toho/Frontier and Manga UK dubs were extensively restored, with the former being reconstructed from an edited version of the dub released on a previous Italian DVD release of the film, as well as copies of the dub provided by fans. Discotek later released the film again on Blu-ray Disc in 2022, with the aforementioned dubs receiving new restorations that greatly improved their sound quality, with the transitions between different sound sources in the Toho/Frontier dub being less noticeable than on the DVD. On this release, the reprise of "Lupin III '79" on the Phuuz/Pioneer dub is replaced by "Lupin Ondo".