Lupin wears a red jacket in this episode.
When Zenigata gets his memory back, he has flashbacks of Lupin from Lupin's Big Western, Lupin vs. Superman and Miss Marie from Lupin Becomes a Bride. Also Zenigata has a flashback of Lupin disguised as Sherlock Holmes III from The Great Detectives Take to the Sky.
The director (Hatsuki Tsuji) and the writer (Shatner Nishida) of this episode later went to make Prison of the Past.