The Seven Assassination Plan: Part 1 (E39)

As the Guts people, an alien race desiring to defeat Earth, study footage of Ultraseven fighting, their plan comes to fruition. They must obliterate him in the public eye to destroy man's spirit. When Dan arrives, he asks Windom to fight, but then the capsule monster is extinguished. The Guts waste no time ambushing Ultraseven. With the hero in their clutches, the Ultra Guard must surrender. (Prime Video)