Concealed Weapon (audio story)

 was the fourth story of the audio anthology, The Diary of River Song: Series Five. It was written by Scott Handcock and featured Alex Kingston as River Song and Derek Jacobi as the War Master.

Publisher's summary
A deep space exploration mission nears its end – when suddenly, the crew start to die.

River must try to protect her colleagues and work out what else is on board their ship.

Something is stalking them, and the deadliest Master of all has his own plans for River Song...

Plot
to be added

Cast

 * River Song - Alex Kingston
 * The Master - Derek Jacobi
 * Amita Burman - Vineeta Rishi
 * Nina Purkis - Orion Ben
 * Hugo - Tom Price
 * Michelle Lambon - Jacqueline King
 * Charlotte Henries - Beth Chalmers
 * Admiral - Richenda Carey

Continuity

 * The Master says he wants to take part into the genetic experiments conducted by Time Lords and the Daleks. (AUDIO: Rage of the Time Lords)
 * The Master reveals that he did look into River's background, having voiced his intention to do so in an earlier incarnation. (AUDIO: Animal Instinct)
 * River remarks "So lovely to see you, again". (AUDIO: The Bekdel Test, Animal Instinct, The Lifeboat and the Deathboat) The Master, however, only remembers two of these incidents. (AUDIO: Animal Instinct, The Lifeboat and the Deathboat)