Kode

Kode was a result of Fitz Kriener having his personality (and whole state of being) copied into a Remembrance Tank when he joined Faction Paradox. Kode was the result of Fitz's personality being re-remembered throughout the time it took to travel to Earth through space. Therefore some of Fitz's personality traits had come through the process, allowing the Doctor to recognise him as Fitz Kreiner (or Fitz's descendant). Like all members of The Remote, he was open to all signals, including the Doctor's TARDIS', which made him more open to the Doctor's cause. Either through these signals, or Kode's wish for the Doctor to restore him to who he was originally, Fitz Kreiner was re-re-remembered using a remembrance tank and the TARDIS's memories him. (EDA: Interference - Book One, Interference - Book Two)