Ep. 18: Lupin hides the Black Panther emerald in a museum while rival inspectors investigate its disappearance.
Aired on February 6, 1978

The Black Panther is the world's largest emerald, named for the black panther image visible when light hits it at a specific angle. Lupin captures this unique stone and conceals it within a museum, intending to retrieve it later. However, the emerald vanishes, complicating the situation further. Two rival inspectors begin investigating the theft, adding pressure to the scenario. The narrative focuses on whether Lupin can successfully recover the gem from the museum despite the interference of the competing law enforcement officers and the mystery surrounding its sudden disappearance.
Episodes
- Ep. 14 · Lupin must return a cursed ruby to a Caribbean cult to save Fujiko from a mysterious fever.
- Ep. 15 · Lupin faces a gem theft challenge aboard the Hendenburg airship
- Ep. 16 · Lupin battles Transformation Sickness that turns him into a cruel criminal at midnight
- Ep. 17 · Lupin III confronts human bomb threats in a blackmail scheme targeting an Arab nation's oil fields.
- Ep. 18 · Lupin hides the Black Panther emerald in a museum while rival inspectors investigate its disappearance.
- Ep. 19 · Lupin faces a keyless safe challenge from the bankrupt Marukin Safe Company's son.
- Ep. 20 · Lupin steals General Hatler's toupee while attempting to take his ruby medallion.
- Ep. 21 · Goemon Returns to Japan to Find His Master Dying and a Stolen Scroll
- Ep. 22 · Lupin and Jigen encounter a deceptive trap involving aging gas at a manor filled with women.