Johnny Sokko and His Flying Robot

X-7: A Mysterious Enemy Agent (1x18)

Air date: Feb 05, 1968

One night, a huge balloon lifts away a big building in the Ginza. Unicorn receives a challenge letter from a mysterious man who calls himself X-7. Johnny Sokko soon discovers that he and X-7 have more in common than anyone knows...and that he must do battle with X-7, who is now operating the Giant Claw!