Sam and Mark continue their search to find the world's next great superhero. The final three superheroes remain in the lair to battle it out to win superhero glory. In this nail-biting finale, the superheroes are sent to action school to test their physical superhero powers. How will they cope when they actually learn to fly? It is finally time to beat their evil nemesis Dr Dark. How will they overcome Dr Dark's strength and will they rid the world of his evil forever? Plus, the superheroes reveal their secret identities to Sam and Mark to help them make the hardest decision of a lifetime. One superhero will become the ultimate superhero.