Someone I Once Knew (audio story)

 was the fourth story of the audio anthology, The Diary of River Song: Series Four.

Publisher's summary
River has tried in vain to keep the Discordia away from the Doctor. Now, as devils run riot through universal spacetime, her own past with her husband is being rewritten. There is one last hope for the universe. A love story – but one that must find an ending…

Plot
to be added

Cast

 * River Song - Alex Kingston
 * Fourth Doctor - Tom Baker

Continuity

 * The Eighth Doctor would later remember these events temporarily. (AUDIO: Songs of Love)