FANDOM

Ask a question in the box below, or search using the box above.

As you enter your question, our massive, TARDIS-sized computers will search out other similar questions. So be sure to check the list that pops up before asking your question. Once you've decided that your question has not been asked before, push the not-so-threatening blue button below.

If you want to ask questions needing speculation or people's opinions, please do it in our Watercooler forum, not here. The main Q&A space is for questions with definitive factual answers. Thanks!

To avoid spoilers in the main Q&A section, please do to not post information about stories that have not been released in the UK, or ask for information about stories that have not yet aired there.

In some circumstances, this is possible. In "The Stolen Earth"/"Journey's End", the Tenth Doctor regenerated without changing his appearance or personality (in effect, he regenerated back into his existing form). He did this by ending the regeneration early, after it had mended his body but before it could transform him. The presence of his spare hand was essential to this and, without it, the regeneration would have changed him. As he explained, "Used the regeneration energy to heal myself, but soon as I was done, I didn't need to change. I didn't want to. Why would I? Look at me. So, to stop the energy going all the way, I siphoned off the rest into a handy bio-matching receptacle, namely my hand. My hand there. My handy spare hand."

Additionally, the conversation between the Eleventh Doctor and the Curator near the end of "The Day of the Doctor" suggested that it is also possible — or will at some time become possible — to regenerate into a past incarnation; the Curator appeared identical to the Fourth Doctor, only aged. He hinted at this to the Eleventh Doctor but did not confirm it explicitly, let alone give any details of how or when.

"The Then and the Now" (comic story), published by Titan Comics, showed different incarnations of the Doctor, including the Curator, attacked by an enemy down his timeline. This more or less confirms the Curator's identity.