Episode 05, "The Imperial City Dreams of Thieves (Part 1)"
Synopsis: Lupin suddenly finds himself in early Showa Era Japan, where he is identified as the thief Golden Mask, and pursued by Inspector Namikoshi and famous detective Kogoro Akechi. He keeps spotting familiar faces, but they're all different people in this time period. He is convinced that taking possession of an enormous clock from Chinas Yuan Dynasty, found by a woman named Ruriko, will assist him in finding answers to his situation. But he has to contend with rivals in stealing in addition to law enforcement. Can Lupin pull off the historical heist? Trouble strikes like clockwork in this mysterious adventure in the past!