Animal Instinct (audio story)

 was the second story of the audio anthology, The Diary of River Song: Series Five. It was written by Roy Gill and featured Alex Kingston as River Song and Geoffrey Beevers as the Decayed Master.

Publisher's summary
On a world where vicious beasts stalk ancient ruins, Professor Song teaches a student the finer points of archaeology.

But then she meets an incarnation of the Master who is desperate to survive.

And if they are going to escape this place alive, they all must work together.

Plot
to be added

Cast

 * River Song - Alex Kingston
 * The Master - Geoffrey Beevers
 * Luke Sullieman - Timothy Blore
 * Dav Christos / Therian Leader - Delroy Atkinson
 * Adella Franz / Therian - Emily Woodward

Continuity

 * River reveals to the Master that she married the Doctor. (TV: The Wedding of River Song)
 * The Master suggests that he should look into River's background. He will eventually do so by the time of his War incarnation. (AUDIO: Concealed Weapon)
 * The Master will later be stranded on another planet inhabited by human-feline hybrids, the Cheetah World. (TV: Survival)