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Transformers: The Headmasters: As Fortress attempts to transform Fortress Maximus, he gets hit by a plasma blast and loses his super energy needed to transform. Spike figures out that the Destrons have found a way to tap the plasma energy from Seibertron's explosion in order to neutralize Fortress. The Terrorcons continue with Scorponok's plan to blow up Mars by drilling up the poles while Hardhead and Chromedome detect the Destron Headmasters and head out to investigate. Fortress, watching his forces lose, order the Trainbots to head out toward Mars to help. Raiden arrives just in time to help the Headmasters, but suddenly Scorponok orders the Destrons to return. Ultra Magnus sends Twincast and his cassettes to spy on the Destrons, and they see Sixshot using the spacebridge to head to the Destron base on Jollo. There, they witness the destruction of the planet within the Black Nebula and the creation of Scorponok's new battle station - Megazarak, which then heads to destroy Fortress Maximus on Mars. Chromedome and Hardhead manage to find a bomb, but before they can defuse it, Megazarak appears and easily defeats all of them. It transforms into a giant robot and starts to beat up on Fortress Maximus, when he receives news that the bombs are ready to go off. The Cybertron Headmasters try to get Fortress to leave, but he refuses to abandon his battle station. Suddenly, they notice that the plasma from the destruction of Mars is actually powering up Fortress Maximus and they escape.

How to Watch Transformers: The Headmasters Season 1 Episode 15 Legally and Safely

If you want to stream Transformers: The Headmasters Season 1 Episode 15 through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Transformers: The Headmasters Season 1 Episode 15 films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.