John later returned as Liz appeared in five Big Finish audio stories narrated by the character: "The Blue Tooth" (2007), "Shadow of the Past" (2010), "The Sentinels of the New Dawn" (2011), "Binary" (2012), and "The Last Post" (2012). The latter introduces Rowana Cooper as Liz's mother, Emily, and the planned sequel was not finished due to John's death in June 2012, although Cooper reappears as Emily Shaw in the audio "The Cloisters of Terror" when she assists the Fourth Doctor and Leela in investigating a mystery at her college. Caroline John's daughter Daisy reprises her mother's role as Liz in "The Third Doctor Adventures- Volume Five: Primord", where Liz is infected by samples of Stahlman's gas and psychologically corrupted to try and infect all of humanity with the gas, nearly infecting the Doctor until he is able to pass on instructions to the Brigadier and Jo about how they might be able to cure the mutation. The 1996 Virgin Missing Adventures novel "The Scales of Injustice" by Gary Russell also explores the events surrounding Liz's resignation from UNIT. Liz additionally appears with UNIT in the Missing Adventures novel "The Eye of the Giant" (1996) and the Past Doctor Adventures novel "The Devil Goblins from Neptune" (1997). Liz eventually does travel in the TARDIS with the Third Doctor and Jo Grant in the Past Doctor Adventures novel "The Wages of Sin" (1999), which takes place after the Doctor regains his freedom, with the Doctor's attempt to take her to witness the Tunguska Event accidentally resulting in them becoming caught up in the truth about the death of Grigori Rasputin. A parallel version of her appears in the novel "Blood Heat" where she is still part of UNIT fighting against the Silurians in a world where the Doctor died before defeating the reptiles. According to the 1997 Virgin New Adventures novel "Eternity Weeps" by Jim Mortimore, Liz dies in 2003, the victim of an extraterrestrial terraforming virus contracted while she was part of a UNIT team investigating an alien artefact on the Moon, despite the efforts of the Seventh Doctor and his current companion Chris Cwej to save her. The part of Liz Shaw was given to Caroline John who was recommended to the outgoing production team by James Cellan Jones. Although John had been working regularly on the stage (including for the National Theatre Company under Laurence Olivier), she was frustrated that she had not gained any TV roles.