Kagayaku Yoru to Southern Cross kara no Shisha (S04E01)

Having run out of clues about the location of the Ancient Treasure, Joker is at a loss. Just then, he happens to see a news broadcast about a gemstone called the Red Comet which is at a lab in Russia. Hosshi's excitement at seeing the jewel spurs Joker to head for the lab at once. Akai Tsubasa is heading for the same lab... but when they get there, they're met by the alien-obsessed mad scientist, Dr. Neo! (Crunchyroll)