Recap: Big Finish Doctor Who CCS 6 E 3 The Memory Cheats
The Company who were investigating Zoe in Echoes of Grey
now have Zoe in their custody, on charges which carry the death penalty. But they are willing to exercise leniency if she cooperates with them in proving that she did travel with the Doctor.
Zoe's current interrogator Jen has discovered evidence that the Doctor, Jamie and Zoe were in Uzbekistan in 1919, and insists that Zoe relate the adventure. Reluctantly, Zoe begins.
The TARDIS landed in Tashkent. The Doctor (who'd posed as an agent of the Soviet secret police in order to get a table at a restaurant), Jamie and Zoe discovered that children were disappearing from their homes, one each night. With the aid of the Lansings, a British couple who ran a local school, they set a trap and discovered that an alien was abducting the children. Before they could follow it, Chebrakov, the real investigator, showed up; the Doctor persuaded him and his men to accompany them. They discovered the alien's spaceship, where the children were being held. In the confusion, Chebrakov and his men were killed and the Doctor rendered unconscious.
The spaceship returned to its home planet, and the Doctor, Jamie and Zoe left in the TARDIS.
But what happened to the children
, Jen asks? Zoe explains that the alien offered them a better life on its home planet, so, with the Doctor out of things, she negotiated with the alien and let it take them back to its world. Jen is shocked at Zoe's callousness, but Zoe is adamant that it was the logical decision.
Later, Jen returns, having checked the story. The name of the alien's home planet isn't a planet. It's the file reference of a secret report on the Elite programme, in which Zoe was educated. Zoe was taken from her family as a child with the promise of a better future, and wants to make Jen aware of just what that entailed; so she made up the story in which the same thing happens to the abducted children. She knew that with that information, it would lead Jen to the truth.