This Doctor was created on Earth in Exeter in 4132 when his Tenth incarnation was stabbed through the gut by the Ultimo Creature and regenerated While Christy Johnson watched on. He then took her with him ("The Ultimo Factor"). The Doctor and Christy had numerous adventures, doing battle with vampires, Daleks, Cybermen, zombies and the Master ("Night of the count"; "Daleks in the big city", "Return of the Daleks"; "Steel Head, Steel Heart"; "Dead men walking"; "End of everything"). However, it was when they met the Master that she was lost when she took a shot from his Temporal Disruptor, erasing her from time and space, with only the Doctor, the Master and Captain Jack remembering she ever existed ("End of everything"). Following this, the Doctor travelled alone for a while. He battled