High Quality Content by WIKIPEDIA articles! Kryten (full name Kryten 2X4B - 523P`) is a fictional character in the British science fiction situation comedy Red Dwarf. Kryten`s registration code on Red Dwarf is "Kryten additional 001". The name Kryten is a reference to the head butler in the J.M. Barrie play The Admirable Crichton.