The Prisoner's Dilemma (audio story)

The Prisoner's Dilemma was the sixteenth release in the Companion Chronicles audio range. It was the eighth story of season 3. It was written by Simon Guerrier and featured Ace.

Publisher's summary
Two prisoners meet in a prison cell. Zara is searching for the segments of the Key to Time; she was only born yesterday but already she’s killed hundreds of people. Ace is more ambitious: she was going to kill everyone on the planet.

What have they got against the people of Erratoon? They go peaceably about their simple assignments, beneath their artificial sky. They share their meals and leisure time and they never ask questions. Are they even real?

Ace and Zara will only survive if they can trust each other. Or perhaps if they sell each other out... If not their awful punishment is to become just like everyone else.

Cast

 * Ace - Sophie Aldred
 * Zara - Laura Doddington

Continuity

 * Ace tells Zara that she once made a "bloke made of liquorice." (TV: The Happiness Patrol)
 * Zara is the twin sister of the Fifth Doctor's former companion Amy (later Abby). The Doctor previously encountered Zara on Mars in the distant past (AUDIO: The Judgement of Isskar) and on Chaos at the end of recorded time (AUDIO: The Chaos Pool). Both of these events have yet to take place in her personal timeline.
 * Ace uses logic to confuse the Robot Constables. (TV: The Curse of Fenric)
 * Ace has had her memories removed once before. (PROSE: Timewyrm: Genesys)
 * Ace remembers travelling with the Doctor and a woman wearing earrings who "knew a lot about dead things." (PROSE: Love and War)
 * Ace vaguely recalls being introduced to Robin Yeadon by her mother Audrey Dudman at Bernice and Jason Kane's marriage in Cheldon Bonniface on 24 April 2010 (PROSE: Happy Endings) and that she had previously met him as a young man in Crook Marsham in December 1968 (PROSE: Nightshade).
 * Ace mentions having Christmas dinner in Cheldon Bonniface in 1992. (PROSE: Timewyrm: Revelation)