people to perceive him as having had sex with someone, to father a child.' I just screamed with hysterical laughter and said, 'In that case, I'm not doing it.'" The script was changed to include references to the characters' relationship. Media historian James Chapman has written that the way Susan was written made her limited, because "she was required to fill the role of the 'screamer' and often had little to do beyond looking pretty and frightened". Ford was similarly displeased with her character, sometimes finding her "pathetic" and frustrating because she was not allowed to develop. In addition, Ford found the series too repetitive. Susan became the first companion to leave the programme, after just 51 episodes. Ford felt that Susan was allowed to develop more in the Big Finish audio dramas. Appearances Television Susan is introduced in the first Doctor Who story, An Unearthly Child (1963), with the first episode focusing on her as an unusual teenager with an advanced knowledge of history and science. This catches the attention of her teachers at Coal Hill School, Ian Chesterton (William Russell) and Barbara Wright (Jacqueline Hill), who follow her home to a junkyard owned by an unseen proprietor named I. M. Foreman. It is implied within the story that Susan took the surname "Foreman" from this junkyard sign as an alias for use at the school, for when her chemistry teacher assumed that her grandfather was "Doctor Foreman" the Doctor replied, "Doctor who? What's he talking about?", indicating that he was unfamiliar with the surname. It is revealed that she and her grandfather, the Doctor (William Hartnell), are exiles from their own people in "another time, another world" and have been travelling through space and time in a machine she named the TARDIS from the acronym "Time and Relative Dimension in Space". As Ian and Barbara have gained this knowledge, the Doctor whisks them away in the TARDIS against their will, and he cannot accurately fly the machine. 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