1981 In 1981 , someone tried to assassinate the Pope . ( PROSE : " The Assassin ' s Story " ) Dated events . January - June . On 28 February , the Fourth Doctor and Adric landed the TARDIS by the side of a motorway to gain measurements of a police box . Air hostess Tegan Jovanka stumbled aboard the TARDIS on her way to work at London ' s Heathrow Airport . Shortly after , Tegan ' s Aunt Vanessa went looking for Tegan but was killed by the Master . Afterwards , The Master ' s actions on Logopolis caused heat death to spread through N - Space in the form of an entropy wave . ( TV : " Logopolis " ) On 1 March , the Doctor stopped the entropy wave by reopening a CVE in Cassiopeia . Soon afterwards , following a fall from the Pharos Project ' s dish , the Fourth Doctor regenerated into his fifth incarnation . ( TV : " Logopolis " ) The newly regenerated Doctor and his companions Adric , Nyssa and Tegan , escaped in the TARDIS . ( TV : " Castrovalva " ) On 30 March , John Hinckley Jr tried to assassinate American President Ronald Reagan . ( PROSE : " The Assassin ' s Story " ) On 7 April , Cassandra Elizabeth Schofield , the mother of the Seventh Doctor ' s companion Hex , was born to Hilda Schofield in Royal Bolton Hospital . ( AUDIO : " Project : Destiny " ) July - December . In August , Martin Tuck was killed by the I Predator . ( AUDIO : " Iterations of I " ) Peter Tracey was given a suspended sentence for breaking and entering . ( TV : " A Girl ' s Best Friend " ) The Fifth Doctor attended a cricket match in Leeds twice . ( PROSE : " Graham Dilley Saves the World " ) A hailstorm struck Moreton Harwood . It lasted only thirteen seconds , but destroyed Commander Bill Pollock ' s crops . ( TV : " A Girl ' s Best Friend " ) From 1 December to 14 December , Sarah Jane Smith was out of the country working for Reuters . ( TV : " A Girl ' s Best Friend " ) On 6 December , Lavinia Smith departed Moreton Harwood for a lecture tour in the United States . Before leaving , she arranged for a mysterious crate addressed to her niece , Sarah Jane Smith , to be left at Moreton Harwood . ( TV : " A Girl ' s Best Friend " ) On 10 December , Lavinia Smith phoned her ward Brendan Richards to tell him that he would be spending Christmas with Sarah Jane . Brendan waited for Sarah to pick him up at Wellington College for over a week , unaware that she was out of the country . ( TV : " A Girl ' s Best Friend " ) On 18 December , Sarah Jane met Brendan for the first time . Shortly afterwards , she opened the crate addressed to her in Lavinia ' s house and activated K9 Mark III , who had been left in her flat in Croydon by the Doctor in 1978 . ( TV : " A Girl ' s Best Friend " ) From 20 December to 21 December , Brendan was kidnapped by the Hecate Cult , who intended to use him as a human sacrifice . However , he was rescued by Sarah Jane Smith and K9 Mark III before this could happen . ( TV : " A Girl ' s Best Friend " ) On 25 December , Sarah Jane , Brendan and K9 Mark III spent Christmas Day with Howard and Juno Baker as Sarah Jane ' s aunt Lavinia Smith was in the United States . ( TV : " A Girl ' s Best Friend " ) On 29 December , members of the Hecate Cult at Moreton Harwood were charged with attempted murder . ( TV : " A Girl ' s Best Friend " ) In December , the Fifth Doctor , Adric , Nyssa and Tegan Jovanka encountered the I and the I Predator on Fleming ' s Island off the coast of Ireland . ( AUDIO : " Iterations of I " ) Unknown dates . Anne Travers became the British Cabinet ' s chief scientific advisor , succeeding her University of Cambridge lecturer and mentor Professor Rachel Jensen . She served in that position until her death on 31 December 1999 . ( PROSE : " Millennial Rites " ) Ellie Ravenwood met her future husband , Dave Oswald , after saving him from being hit by a car . Unbeknownst to them , they were watched by the Eleventh Doctor , who was trying to figure out the history of Clara Oswald . ( TV : " The Rings of Akhaten " ) . In some timelines , Alistair Gordon Lethbridge - Stewart retired from UNIT and began teaching at Brendon Public School . Just after telling the UN he was retiring , Lethbridge - Stewart was taken from time by the Accord and copied to help stabilise the temporal instability concerning the 1970s and 1980s being melded together . He was returned to his present time and retained no memory of the incident . ( PROSE : " The Enfolded Time " ) Joel ' s father lost his job . He was still out of work in 1991 . ( AUDIO : " The Blood Furnace " ) Behind the scenes . According to the Torchwood House website , the Torchwood House was opened to the public in this year .