Mission of the Viyrans (audio story)

 was a one-part story released along with The Mind's Eye. Unlike other releases, this story is not connected to the story it is released with nor does it have the same cast as The Mind's Eye; this story does not feature Erimem played by Caroline Morris.

Publisher's summary
Mission of the Viyrans (A One-Part Story)

The Doctor and Peri take a holiday on the planet Grallista Social, but soon discover they aren't the only time-travelling aliens in town.

Cast

 * The Doctor - Peter Davison
 * Peri Brown - Nicola Bryant
 * Lawrence - Peter Sowerbutts
 * Chris - Philip Childs

Continuity

 * Peri remembers her imaginary stepson Kyle (BFA: The Mind's Eye), Dracula (BFA: Son of the Dragon) and Erimem's departure (BFA: The Bride of Peladon).
 * The nature of Virus 7001 and the Viyrans' "glass coffins" should later be explained in greater detail in BFA: Patient Zero, in which the Sixth Doctor returns to Grallista Social in the company of Charley Pollard.

Timeline

 * Mission of the Viyrans occurs after BFA: The Bride of Peladon
 * Mission of the Viyrans occurs before ST: Methuselah