The Tenth Doctor “Regenerates” - The Stolen Earth (2008)
Reunited with Rose Tyler, but exterminated by a rogue Dalek, the Tenth Doctor’s body begins to glow. Diverting some regenerative energy into his previously-dismembered hand, the Doctor appears to survive unscathed. Only later do we learn that this was indeed a full regeneration, but that the Doctor kept the same face out of vanity!
Here’s the moment we bid farewell to the Matt Smith’s Eleventh Doctor, and welcome Peter Capaldi’s Twelfth.
We all change. When you think about it, we’re all different people all through our lives. And that’s okay. That’s good. You’ve got to keep moving, so long as you remember all the people that you used to be.