Susan Foreman is a fictional character from the British science fiction television series Doctor Who. She is introduced as the granddaughter of the First Doctor, played by William Hartnell, and first appears in the show's debut episode in 1963. Susan is known for her intelligence and curiosity, often exploring new worlds alongside her grandfather and their companions. In the series, Susan is portrayed by actress Carole Ann Ford. Her character is significant as she represents the connection between the Doctor and humanity, showcasing the emotional depth of the Time Lord's adventures. Susan eventually leaves the Doctor to find a new life on Gallifrey, the Doctor's home planet.