The De Danaan is heading toward Melida Island when it receives an emergency contact. Gauron's troops have appeared at Beridaobu Island! This island is the US military's chemical weapons base. They have Gauron's new AS, Venom, rampaging around and also the latest mass production model, known as Shadow. Things start to get tense for Sousuke and the others.
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Ready to Watch Full Metal Panic, Season 1, Episode 20?