Ultraman: S1 E16 - Science Patrol Into Space Ultraman

Human's first Venus Exploration Rocket Otori was launched by its inventor, Professor Mori. However, a mysterious object drew near and finished docking with it. It was a new invasion plan from Alien Baltan, the species that was supposed to be annihilated by Ultraman. The only ones that can stop them are SSSP and Ultraman!