First Appearance: "The Breed."
Details: Peter Morton and his sister Rachel were assigned to Fort Perry, where Dr. Vincent Arrigo was developing a parasite which could control the actions of its human host. Dr. Arrigo used his research assistant Rachel as his first test subject, purposefully infecting her without her consent. Unfortunately, he was unable to create a cure in time to prevent her from breaking out of containment. Under the influence of the parasite, Rachel attacked Peter, who was forced to hurt her in order to survive.
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