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.
Susan Foreman
Susan Foreman is a fictional character in the British science fiction television series "Doctor Who". The granddaughter and original companion of the First Doctor, she was played by actress Carole Ann Ford from 1963 to 1964, in the show's first season and the first two stories of the second season. Ford reprised the role for the feature-length 20th anniversary episode "The Five Doctors" (1983) and the 30th anniversary charity special "Dimensions in Time" (1993).