Ultraman S01E16 - Garamon Strikes Back

One night, a strange man dressed in black steals the sample of Tilsonite stored in the vaults of the Astrophysics Research Center. Professor Ichinotani alerts Yuriko, Jun, and Ippei of the theft, and that the "Electronic Brain" has started transmitting radio waves into space. Scientists detect a cluster of Garadamas heading to Earth, with Tokyo as their target.