<P> Susan continues to travel with the Doctor and her two teachers until the 1964 serial, The Dalek Invasion of Earth . During the events of that story, Susan falls in love with David Campbell (Peter Fraser), a young freedom fighter in the 22nd century . However, Susan feels that she has to stay with and take care of her grandfather . The Doctor, realising that Susan is now a grown woman and deserves a future away from him, locks her out of the TARDIS and leaves after a tearful farewell . Ford reprised the role of Susan on television in the 20th anniversary special The Five Doctors (1983), but no mention of David, or what became of him, was made on screen . In the novelisation of the same story, they are still married . Ford also reprised her role for the 1993 charity special Dimensions in Time . </P> <P> In The Curse of Fenric (1989), the Seventh Doctor (Sylvester McCoy) states that he does not know if he has any family . In "The End of the World" (2005), the Ninth Doctor (Christopher Eccleston) states that his home world has been destroyed and that he is the last of the Time Lords . Although Susan is not mentioned by name, the Ninth Doctor says in "Father's Day" (2005) that his "whole family" died, and in "The Empty Child" (2005), Doctor Constantine (Richard Wilson) remarks he has been a father and grandfather, but now he is neither, and the Ninth Doctor replies, "I know the feeling ." In "Fear Her" (2006), the Tenth Doctor (David Tennant) states nonchalantly, "I was a dad once," but does not elaborate on this revelation . In "The Doctor's Daughter" (2008), the Tenth Doctor further clarifies to Donna Noble (Catherine Tate) that he had been a father prior to the creation of his "daughter" Jenny (Georgia Moffett), who was created by a machine using the Doctor's DNA, and that he "(l) ost all that a long time ago, along with everything else ." In "The Rings of Akhaten" (2013), the Eleventh Doctor (Matt Smith) mentions that he travelled with his granddaughter to the rings of the planet Akhaten . The 2013 episode "Journey to the Centre of the TARDIS" contains audio from the scene in An Unearthly Child where Susan explains how she named the TARDIS . A brief glimpse of Susan, played by an unidentified body double, is seen in the opening scene of "The Name of the Doctor", which depicts the Doctor and Susan leaving Gallifrey in a TARDIS . </P> <P> Following the revelation in 2013's "The Day of the Doctor" and "The Time of the Doctor" that the Time Lords were not, as originally believed, wiped out by the Doctor's hand, Susan's fate after The Five Doctors remains ambiguous . In "Death in Heaven" (2014), the Twelfth Doctor's (Peter Capaldi) companion Clara Oswald (Jenna Coleman) pretends to be the Doctor in order to confuse the Cybermen and buy herself time to escape; she describes the Doctor's children and grandchildren as "missing and, I assume, dead ." In the Class episode "For Tonight We Might Die", Susan's name is displayed on the roll of honour at Coal Hill Academy, along with Clara Oswald and Danny Pink . A photograph of Susan is seen on the Doctor's desk in a university where he is lecturing in 2017's "The Pilot", beside a photograph of River Song . </P> <P> Susan's character has been expounded upon in spin - off media . In 1983, Doctor Who's then - script editor Eric Saward wrote a short story dealing with the Doctor's departure from Gallifrey for the Radio Times Doctor Who 20th Anniversary Special . This story, "Birth of a Renegade", depicts Susan as a descendant of Time Lord founder Rassilon and the last surviving member of Gallifrey's royal family, unrelated to the Doctor . A later script editor, Andrew Cartmel, had another explanation of Susan's origins . This account, part of the "Cartmel Masterplan", was not used in the programme, but was used as background for several of the Virgin New Adventures novels, most notably Lungbarrow by Marc Platt . In this version, Susan is the granddaughter of the mysterious Gallifreyan founder known as the Other, who may have been reincarnated as the Doctor . The Doctor had travelled back to the dawn of Time Lord civilisation and rescued Susan, who recognised him as her grandfather . The Doctor did not initially recognise her, but knew that this was somehow true . </P>

What happened to susan the doctor's granddaughter