The First Son (audio story)

 was the first story in the audio anthology Dalek Universe 3, produced by Big Finish Productions. It was written by Lizzie Hopley and featured David Tennant as the Tenth Doctor, Jane Slavin as Anya Kingdom and Alex Kingston as River Song.

Publisher's summary
The Doctor's attempts to return home have led him to the middle of a war zone... and a familiar voice.

The travellers have arrived on a planet made up of crashed space-ships where they encounter River Song... Or do they? Because she's dressed as a Movellan and claims to be a member of that robot race. Is she undercover, a duplicate, or something more sinister?

And more importantly... who is her son?

Plot
to be added

Cast

 * The Doctor - David Tennant
 * Anya Kingdom - Jane Slavin
 * River Song - Alex Kingston
 * The Daleks - Nicholas Briggs
 * Rodekka - Noma Dumezweni
 * Kamen Vers - Matthew Jacobs-Morgan

Continuity
to be added