Andromeda - Season 3 Episode 8 For Whom the Bell Tolls

After rescuing some people from a storm, a 'maggot' is brought onto Andromeda. This maggot chews through the systems and activations an old hologram of a crew member. This member had sealed himself in one of the hidden decks before the event horizon and had some through it. Believing that Dylan has betrayed the Commonwealth, an avatar and android of the crew man takes over the ship to bring Dylan to justice...