The 4400 - Ghost in the Machine

Seizoen: 4 - Aflevering: 11 / 42 - Eerst uitgezonden: 26 augustus 2007 - Episode ID: 272717

Tom and Diana must race to find the source of a computer virus that could bring down Ubient software, one of the world's largest software companies that is run by suspected member of the marked, Drew Imroth. Meanwhile, Maia visits Promise City where she receives an unexpected birthday surprise: a visit from her birth parents.