Ep. 36: The Riddle of Tsukikage Castle
Ipinalabas noong Hunyo 12, 1978

Massive riches have been hidden inside Tsukikage Castle. Lupin and his gang must decipher a code to find out the whereabouts of this great treasure. However, the Fuma Ninja Clan is also plotting to take the treasure for themselves. Will Lupin be able to decipher the code and locate the treasure before his rivals do? (Source: Crunchyroll)