Captain Proton Versus the Cosmic Creature
Captain Proton Versus the Cosmic Creature was a Captain Proton adventure which featured alien invaders.

In 2375, while playing the role of Captain Proton, Tom Paris was confused when Satan's Robot mentioned "invaders from the Fifth dimension", as the story he was playing,
unlike Captain Proton Versus the Cosmic Creature, did not feature alien invaders. ()
The Adventures of Captain Proton