- Accidental Innuendo: Goemon's words right before he uses his sword to non-lethally remove a bomb planted in Belladonna's heart?Goemon: Relax, I'm going in.
- Hilarious in Hindsight:
- The English dub has Cassandra Lee Morris voice Rebecca Rossellini, who the Phantom Thief Lupin marries in the first episode. She'd also voice the partnering cat of another Phantom Thief that uses Arsene Lupin as his Persona.
- A significant chunk of the series revolves around Lupin's attempts to annul his marriage to Rebecca—who in turn is called out by Fujiko during the events of "The Drunken Pig" for not knowing Lupin at all, leading Rebecca to begin reflecting upon their "relationship." By the finale, Rebecca reveals to Lupin she never actually signed their marriage certificate and, having genuinely fallen for him, wants to become a thief worthy of the name "Mrs. Lupin". In the following series, viewers eventually learn that Lupin instead got hitched to Fujiko sometime after their adventures in Italy. On the other hand, Fujiko's aforementioned dressing down of Rebecca crosses over into Harsher in Hindsight, as the pair also divorced prior to Part 5, creating a rift between them that drives Fujiko to prod Lupin for answers on how he really views her—though Lupin's answer to her question in the final episode and the ending of Part 5 itself suggests they're (probably) back to being an Outlaw Couple.
- Germans Love David Hasselhoff: Due to the immense popularity of the Lupin III franchise in Italy, the series began airing over there several months before it aired in Japan.
- Misblamed: Some complained to Discotek Media for basing the English dub on the Italian airings rather than the Japanese version. That decision was made by TMS themselves, however; at worst, Discotek was a bit hands off with the dub. Additionally, the DVD and Blu-ray releases of the series separated the Japanese audio and the English audio rather than putting them in the same set. Some complained about this as well, but according to Reed Nelson, this was because the Italian video, the one used for the English dub, and the Japanese video have many visual differences, and alterations to the dub audio would be needed to line it up with the Japanese visuals. Giving the dub and the sub their separate sets was the best compromise they could come up with.
YMMV / Lupin III: The Italian Adventure