The sun is about to go out, so Courage and his owners go to outer space to fix it. Meanwhile, a tiny space-dwelling creature named Vastabael Backjurius goes inside Muriel’s brain and starts making her go insane so that their mission ends up disastrous. He wants them to fail, because he along with all the other aliens see all Earthlings abusing their planets, because all aliens like the dark.

Mission to the Sun