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
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.

Full audio
MissionOfTheViyrans

Cast

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

Foods and beverages

 * Grallistan punch deserves its reputation for potency.

Individuals

 * The Viyrans attempt to wipe Peri's memories, failing three hundred thirty eight times to achieve "Memory Zero".

Planets

 * Grallista Social is a party planet.

Species

 * The Viyrans come from a galaxy which has known only war for millennia.

Continuity

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