Mission of the Viyrans (audio story)

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

The Doctor and Peri take a holiday on the planet Gralista 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
to be added

Timeline

 * Mission of the Viyrans occurs after: The Bride of Peladon
 * Mission of the Viyrans occurs before: The Key 2 Time - The Judgement of Isskar