This episode looked like someone's fever dream, it looks like Lupin is transported in a parallel world where he is experiencing a major Jamais vu on the people he knows and somehow the detective in the world he's in is Kogoro Akechi (one of the three great detectives of Japan) which is quite interesting. Considering this is a two part story, the pacing isn't rushed and an ample amount of information is given as the story proceeds