"Farewell My Beloved Lupin" is the 155th and final episode of Red Jacket. It is the 52nd episode in its 4th season.
An armored robot flying through the skies of 1981 Tokyo raids a jewelry store, demonstrating truly amazing capabilities, and disappearing no one knows where. Lupin's announcement is, what's strange about me using a robot like this? The operator, Maki Oyamada, is cooperating in order to show what a dangerous weapon this robot is, but the truth is, the whole thing is a conspiracy by a party who would like to weaponize the robot. However, the real Lupin gang shows up to crack the case wide open.
- After the massive critical success of The Castle of Cagliostro, TMS brought in Hayao Miyazaki once more in order to make their final episode as memorable as possible. As a result, the studio granted Miyazaki total creative control over the production of the episode.
- This would be the last television program Hayao Miyazaki worked on before moving on to feature films exclusively. This would also be the last Lupin related project to-date that featured Miyazaki's involvement.
- The title of this episode is a callback to the third episode of The Green Jacket Series: Farewell My Beloved Witch.
- The opening is a an homage to the opening of the 1941 Superman short film, "Mechanical Monsters". The plot itself includes elements from the same short as well.
- Fujiko's design in the episode is said to have been an inspiration for the character model of April O'Neil in the American cartoon, Teenage Mutant Ninja Turtles.
- The Lambda robot, as well as the base character model for Maki Oyamada would be slightly altered and reused in Miyazaki's subsequent films: Castle in the Sky and Nausicaä of the Valley of the Wind, respectively.
- Due to Miyazaki's involvement, this episode features the very best animation and picture quality out of the entire Red Jacket series.