The Mighty DESTROYER!
Warrior Woman throws Captain America over the edge of the castle, but he's saved by the Destroyer, whom Cap recognizes from the comic book adaptation of the rumors of his existence. Unlike the "fictional" American version of the Destroyer, Cap notices this one is distinctly British, and is further shocked when the Destroyer unmasks to reveal his identity.
Meanwhile, the Nazis confine the other Invaders in yet another set of custom-designed cages and Hitler makes plans to have Master Man and Warrior Woman marry to breed the next generation of Nazi super-soldiers, though Warrior Woman is hesitant to accept that fate. Captain America and Destroyer infiltrate the castle and free Private Biljo White, but learn that the Invaders are already en route to Berlin for a public execution.
Already in Berlin, Lord Falsworth, Spitfire, and Dyna-Mite covertly air-drop past enemy lines on a mission to help Dyna-Mite, whom the Falsworths now call "Roger", to regain his lost memories.
Enter: The Mighty DESTROYER!