Deciding to move on after making the role his own, the Scottish actor didn't want to "outstay" his welcome, saying: "It would be very easy to cling on to the TARDIS console forever and I fear that if I don't take a deep breath and make the decision to move on now, then I simply never will."May 3, 2021
Told that he would die when someone knocked four times, the Doctor remained defiant, but to no avail. Reeling from his confrontation with the Time Lords and fatally dosed with radiation, the Tenth Doctor's song ended, as his violent regeneration burned the TARDIS and sent it crashing through space….
I dislike Ten's regeneration for two reasons. The first is that it was over-emotional. … The second is that it goes against everything that was ever said about the concept of regeneration at other points in the show's run. Recall when the Tenth Doctor first appeared on the scene in the 2005 Children in Need mini-episode.
Rose was the first companion that they knew and they were disappointed to see her leave. But older fans knew it was just the way the show works – and love the show that way. In an interview, Billie Piper she said she chose to leave because she “didn't like the responsibility of being a role model.”
The latest Doctor Who rumors suggest that EastEnders star Danny Dyer could now be in the running to play the 14th Doctor! His departure from the legendary soap was confirmed by the BBC on Saturday, Jan. 8, 2022, and is set to take place later this year.
In-universe, Peter Capaldi's Twelfth Doctor regenerated because of the accumulated damage he had sustained in battle with the Cybermen. … It took an unexpected encounter with his first incarnation, who likewise was resisting a regeneration, to convince the Doctor he had to let it happen.
Clara is the future child of the Doctor and River who's had her memory erased. The two Time Lords must be up to something on their nights away from River's prison cell.
The line, “I don't want to go,” although scripted, was his own because he felt that he had to move on but he literally didn't want to go.
The Second Doctor experiences crippling pain after his first regeneration (in The Power of the Daleks), while the Third Doctor collapses outside the TARDIS following his regeneration (in Spearhead from Space).