Regeneration is the "secret sauce" of Doctor ... Not only did the Time War serve to wipe the slate clean, it also gave the ...

In the Ninth Doctor's final moments, he absorbs the Time Vortex energy from Rose to save her life, which also causes him to regenerate. Since Rose continues traveling with the new regeneration ...

This is only the second time in which the Doctor regenerates without a companion ... photographs in Clive's shed you may notice that the Ninth Doctor is seen present at The Kennedy assassination ...