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Underworld
Season 1, Episode 24
Episode guide
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The Sword of Jo-Lan
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Remote Control

Underworld is the 24th episode of A.T.O.M. series.

Summary[]

As the Alpha Teens finally discover where Paine's base is located, Paine seeks to tunnel under Landmark City flood the city with lava. However, because of the intense heat of the lava, Paine forces Vinnie Rossi, now the monstrous concrete man, dubbed Mass, to do the job, or else his mother will pay the price.

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