The Prisoner's Dilemma (audio story)

The Prisoner's Dilemma was the eighth story of the third series of The Companion Chronicles, produced by Big Finish Productions. It was written by Simon Guerrier, narrated by Sophie Aldred and featured the Seventh Doctor, Ace and Zara.

It was set directly during the Key-2-Time arc in the Main Range featuring the Fifth Doctor and Amy. It's also the first story in the Companion Chronicles range to feature the Seventh Doctor.

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.

Plot
to be added

Cast

 * Ace - Sophie Aldred
 * Zara - Laura Doddington

Continuity

 * Ace tells Zara that she once met 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 mentions visiting the Trib Museum. (AUDIO: The Lost Museum)
 * Ace vaguely recalls her mother bringing someone to a wedding, (PROSE: Happy Endings) and that she had previously met them when they was the same age as her. (PROSE: Nightshade)
 * Ace mentions having Christmas dinner in Cheldon Bonniface in 1992. (PROSE: Timewyrm: Revelation)
 * Zara refers to the fact that the Fourth Doctor and Romana went on the run after assembling the Key to Time. (TV: The Armageddon Factor)