Nilanium - The hardest metal in the world featured on the episode "I'll Be A Mummy's Uncle" of the fantasy series BATMAN/ABC/1966-68. The villain King Tut (Victor Buono) discovered a deposit of Nilanium right under the Mansion owned by Bruce Wayne (a.k.a. "Batman"). Buying a piece of property adjacent to Wayne Manor, Tut began to slant drill under the property. Instead of hitting the Nilanium deposit, King Tut hit the protective Batanium Shield Lining to the Batcave. With the assistance of Batgirl, Batman and Robin thwarted the zany Egyptians plan to obtain the Nilanium and to destroy the Batcave.