Therefore, its known narrative elements are not a part of the Doctor Who universe as we, on this Wiki, choose to define it. It may have been the basis for a similar story in another medium, however — and that story may indeed be valid.
Death to the Doctor was a unmade script for Series 5. It was to have been written by Gareth Roberts and would have featured a disgraced Sontaran called Strom. Steven Moffat would later inform a delighted Roberts that his character idea would see the light of day. This idea would become Commander Strax, a recurring character who first appeared in Series 6's A Good Man Goes to War. (REF: The Brilliant Book 2012)