In Doctor Who, when is the first time it is stated that the Doctor (and all other timelords) have two hearts?
I know that in the old episode 'The Sensorites' the Doctor says something about his heart (singular).
Science Fiction & Fantasy Stack Exchange is a question and answer site for science fiction and fantasy enthusiasts. It only takes a minute to sign up.Sign up to join this community
The first instance that The Doctor is confirmed as having two hearts is Spearhead from Space, the first story of the Third Doctor, where one of the characters discovers that the Doctor has two hearts.
At the hospital, Doctor Henderson discovers the Doctor's blood supply is different and that he has two hearts.
According to the Heart article from the TARDIS wiki, The Edge of Destruction and The Wheel in Space both make the mistake of saying that the Doctor only has one heart.
I looked this up because I am watching one of the only stories still around with the Second Doctor, The Dominators.
They just examined Jamie and said one heart, etc. Then the other Dominator not doing the exam asks about examing The Doctor but the first says no, he will have the same. I wonder if they were already thinking two hearts then but just didn't mention it.
lol Haven't finished watching and just got to the part where they find out the natives have two hearts, so maybe not.. who knows.