The First Doctor regenerated following an exhausting ... radiation in order to defeat a terrifying enemy. This caused a regeneration witnessed by Sarah Jane and the Brigadier.

After all the doomy portent, it's strange to have such a magic, hand-wavey solution to the Doctor's "death" on Trenzalore.

Doctor Who's first proto-Master came in 1965's "The Time ... in stealth-developing the Master came via Patrick Troughton's regeneration episode, "The War Games." Echoing "The Time Meddler ...

The Doctors remarks about his appearance as he looks into the mirror in Rose's flat, suggest his regeneration was a very recent one. However, this is the first and only time in which the ...