The Second Doctor has been partially regenerated by the Time Lords as punishment for breaking the non-interference policy, but the process is stopped halfway, leaving the Doctor an amalgam of his second and as-of-yet future incarnation...
Storyline
The Second Doctor has been partially regenerated by the Time Lords as punishment for breaking the non-interference policy, but the process is stopped halfway, leaving the Doctor an amalgam of his second and as-of-yet future incarnation...