Also known as "Mercy Mercy Me."
The character designs of the Chief and the Police Officer strongly resemble Lupin. The Chief looks like Lupin wearing glasses and the Police Officer looks like a younger Lupin that saved Hanshichi.
The episode is set in the Taito Ward in Tokyo, mainly around the Ueno district.
Hanshichi is shown carrying a jitte in a flashback. A jitte is a traditional Japanese bludgeon used to block swords.