The Sontaran Project (audio story)

 was the third story in the audio anthology, Encounters, produced by Big Finish Productions. It was written by Andrew Smith and featured Jemma Redgrave as Kate Stewart and Ingrid Oliver as Petronella Osgood.

Publisher's summary
On a routine reconnaissance mission, Colonel Shindi finds more than he bargains for in the Forest of Ardennes. Back in England, an old colleague makes Osgood an offer she cannot refuse. The chance to take part in an exciting new scientific advance. Before long, UNIT is on collision course with a force of alien clones, and Kate must forge an unlikely alliance.

Plot
to be added

Cast

 * Kate Stewart - Jemma Redgrave
 * Osgood - Ingrid Oliver
 * Colonel Shindi - Ramon Tikaram
 * Marshal Skar/Commander Merx/Sontaran Escapee - Dan Starkey
 * Professor John Torrance - James Wilby
 * Christine Colley - Beth Goddard
 * Overseer - Matthew Cottle
 * Aide/Soldier - Jot Davies

Continuity

 * Kate recalls the Sontarans' recent attempt to turn Earth into a Sontaran breeding planet through alteration of its atmosphere. (TV: The Sontaran Stratagem/The Poison Sky)
 * The Auctioneers operate a black market dealing in alien material on Earth. (AUDIO: The Dalek Transaction)