Signs (audio story)

 was the third full cast audio story in the first series of The Diary of River Song, released in 2015 by Big Finish Productions.

Publisher's summary
River Song is on the trail of the mysterious, planet-killing SporeShips.

Nobody knows where they come from. Nobody knows why they are here. All they do know is that wherever the SporeShips appear, whole civilisations are reduced to mulch.

But River has help. Her companion is a handsome time-travelling stranger, someone with specialist knowledge of the oddities and dangers the universe has to offer. For Mr Song has a connection to River’s future, and he would never want his wife to face those perils alone…

Plot
to be added

Cast

 * River Song - Alex Kingston
 * Mr Song - Samuel West

Continuity

 * Mr Song repeatedly consults the Doctor's Five Hundred Year Diary while impersonating him. (PROSE: The Three Paths et al) In fact, it is River Song's diary covered in a sheet of paper labeled "500 Year Diary." (TV: Silence in the Library et al)
 * River says, "Spoilers!" (TV: Silence in the Library et al)
 * Mr Song mentions the idea of fixed points in time. (TV: The Parting of the Ways et al.) River refutes the concept of fixed points when she is around. (TV: The Wedding of River Song)
 * River refers to how she'd still be "immortal" if she hadn't given up her remaining regenerations for the Doctor and wonders who she'd be if she still had them. (TV: Let's Kill Hitler) She believes her remaining regenerations gave the Doctor "a few more faces," including Mr Song's. When she encountered the Twelfth Doctor, she believed he had no more than 12 regenerations. (TV: The Husbands of River Song)
 * The Sarah Jane was Mr Song's ship, named after the Doctor's companion, Sarah Jane Smith. (TV: The Time Warrior et al)
 * Mr Song makes tea. The Doctor has portrayed a fondness for the drink over his regenerations. (TV: Doctor Who et al.)
 * Mr Song references a trip from River's diary about the time she and the Doctor went to Florana for the golden sunset and encountered a rude tour guide. (TV: Invasion of the Dinosaurs et al) The Eleventh Doctor spent a holiday there with her parents. (COMIC: Summer Wholiday)
 * River calls Mr Song "Sweetie." (TV: Silence in the Library et al)
 * Mr Song says he will defocus the thermocouplings on the Sarah Jane. (TV: The Hand of Fear, Time / Space)
 * River, believing that she is dying, calls Mr Song "my love." (TV: The Big Bang, COMIC: The Birthday Boy)
 * River is cloned. River was previously cloned with the Flesh in her first incarnation (TV: A Good Man Goes to War) and stopped a cloning operation in Manhattan. (PROSE: The Angel's Kiss: A Melody Malone Mystery)
 * Mr Song recalls a murder mystery and a party. (AUDIO: I Went to a Marvellous Party)
 * The Doctor has been impersonated before. (AUDIO: UNIT: Dominion)
 * River wishes for the Doctor to burn her diary upon her death. (TV: Forest of the Dead)
 * Impersonating the Doctor, Mr Song states that he hates spiders having encountered them in various forms throughout, claiming that he "never get[s] out of it well." (TV: Planet of the Spiders)
 * Frustrated with "the Doctor", River tells him that she "could kill [him], again." (TV: Let's Kill Hitler, The Wedding of River Song)
 * River is cloned and terminated multiple times by Mr Song, with the original River remembering their experiences. The Twelfth Doctor undergone a similar ordeal within his confession dial for 4.5 billion years. (TV: Heaven Sent)