Sheena (The Starship of Theseus)

Sheena was a companion of the Eighth Doctor whose life was altered and ultimately erased by the Time War.

Sheena
Sheena learnt about the solar system in school and recognised Jupiter by sight. She travelled in the TARDIS with the Eighth Doctor and had a number of adventures, leading her to decide that it was time for them to take a holiday when they landed on the Theseus. She did not believe that the disappearance of Koloth's sister was suspicious and was eager to watch the ship's take-off. (AUDIO: The Starship of Theseus)

Emma
As a result of the Time War affecting history, Sheena became Emma and met Quarren and Rupa Maguire as she and the Doctor waited for take-off, a view which amazed her. She did not notice that Koloth had not been escorted from the ship and went with the Doctor to investigate, pretending that they were with the cabaret in order to get past Jefferson and into the crew quarters. (AUDIO: The Starship of Theseus)

Louise
Emma became Louise, who indicated that she came from several centuries in the past. She and the Doctor found Koloth, although a change in time meant that they had not yet done so and were too late to save him from the troll. The Doctor called Louise by her previous two names and forgot how they met and how long they had spent together, with Louise herself hesitating for a moment before giving her name. They fled from the troll and joined the refugees; when the Doctor mentioned people being on holiday, Louise told him that the Theseus was a refugee ship. (AUDIO: The Starship of Theseus)

Fate
Louise disappeared and the Doctor came to remember that he had arrived on the Theseus alone. Quarren and Rupa confirm that this was the case, although they recall that he said that he lost somebody in the attack before the Theseus launched. When he remembered the Time War, he recalled being with a girl. (AUDIO: The Starship of Theseus)

Legacy
Following exposure to a significant number of alternate timelines shown in Professor Deepa's quantum visualiser, the Doctor regained his memories of both Sheena and Emma. (AUDIO: State of Bliss)

When Bliss began to remember the Time War following their erasure by the Valeyard, she remembered "a woman" on the Theseus who also knew the Doctor. (AUDIO: Dreadshade)

Behind the scenes

 * John Dorney wrote Sheena as a "fairly standard [and] traditional" companion. (VOR 104)
 * David Richardson had Olivia Vinall on his "radar" for some time and, whilst she had proven unavailable for other roles at Big Finish, she was able to record for Sheena between filming dates. (VOR 104)