Teenage Mutant Ninja Turtles (1987): Season 7, Episode 8

7 - 8: Shredder's New Sword

The Turtles and Splinter are visiting London's British Museum, and study a portrait of King Arthur, Queen Guinevere and the Knights of the Round Table. In Dimension X, Krang is using a long-range scanner and discovers a rare metal buried in a ruined castle in England.