Captain Scarlet is guarding a particle collider at the Laroux Foundation in Louisiana, 2 Mysteron Replicants try to break in but Scarlet takes care of them. In the firefight a container tank is hit and releases a gas type substance which the Mysterons take over. An exact copy of Captain Scarlet walks through the gas and shoots the real Captain Scarlet dead. The fake Scarlet disposes of the real Scarlet and makes his way back to Skybase where he can turn himself into whoever he touches and sets out to kill Colonel White and destroy Skybase.

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