Second Doctor
The Second Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series "Doctor Who". He was portrayed by character actor Patrick Troughton.
Adam Mitchell (Doctor Who)
Adam Mitchell is a fictional character in the British science fiction television series "Doctor Who", played by Bruno Langley. Adam is introduced in the first series of the programme's revival as the second television companion of the Ninth Doctor (Christopher Eccleston). However, unlike the Ninth Doctor's primary companion, Rose Tyler (Billie Piper), who provided an effective human contrast to the Doctor's centuries-old alien, Adam was created to provide an example of an inept time traveller.