The fun of long-running entertainment franchises is that they occasionally enter a stage where they become more like anthologies – playgrounds where many different stories are told using familiar characters. Lupin the Third is one such anime franchise. While the series has never really had a ton of continuity, the more recent series are a fun blend of ongoing storylines and one-off episodes that are more fun and occasionally fanservicey (of the type that’s more involved in signaling to folks who are “in the know” rather than the type that’s about nudity).
