Two's Company (audio story)

 was the fourth story in the Once and Future audio series, produced by Big Finish Productions in celebration of the 60th Anniversary of Doctor Who.

It was written by Lisa McMullin and featured Colin Baker as the Sixth Doctor, Tim Treloar as the Third Doctor, Christopher Naylor as Harry Sullivan, Camille Coduri as Jackie Tyler and Michelle Ryan as Lady Christina de Souza and introduced Michael Maloney as The Renegade.

Publisher's summary
The Time War. The Doctor has been injured and brought to a Time Lord field hospital His body glows with energy, but this is no regeneration into a future form – instead, the Doctor’s past faces begin to appear as he flits haphazardly between incarnations…

Staggering to his TARDIS, the Doctor sets out to solve the mystery of his ‘degeneration’. Who has done this to him? How? And why? From the Earth to the stars, across an array of familiar times and places, he follows clues to retrace his steps, encountering old friends and enemies along the way. Tumbling through his lives, the Doctor must stop his degeneration before he loses himself completely...

Back on Earth, the Doctor finds a clue in the search for the origins of the degeneration weapon. In his Sixth body, he meets Jackie Tyler and Lady Christina de Souza – thrown together by fate, or something more? – in pursuit of a powerful item of jewellery.

Meanwhile, a Time Lord renegade has duped Harry Sullivan into helping him stop the Doctor’s travels before they begin – and all are set on a collision course.

Plot
to be added

Cast

 * The Doctor - Colin Baker
 * Lady Christina de Souza - Michelle Ryan
 * Jackie Tyler - Camille Coduri
 * Harry Sullivan - Christopher Naylor
 * The Two - Michael Maloney
 * Jonty / The Postman - Charlie Tighe

Uncredited cast

 * The Third Doctor - Tim Treloar

Continuity

 * When the Doctor degenerates from his Third into his Sixth incarnation, Harry exclaims: "You should've turned into my Doctor, except... not here! Not now!" (TV: Planet of the Spiders)
 * Jackie is not impressed with Rose brings back from her travels with the Doctor. (TV: Army of Ghosts)
 * Jackie is aware that Rose signal in the Doctor's TARDIS. (TV: The End of the World)
 * The Doctor refers to himself as one of the good Time Lords. (TV: The Night of the Doctor)
 * Harry is aware that not all of the Doctor's companions have survived travelling with him. (TV: The Daleks' Master Plan, Earthshock)
 * UNIT has been collecting information on the Time War. They believed that all of the Time Lords have died. (TV: Rose, The Day of the Doctor et al)
 * The Doctor once again refers to Harry as an imbecile. (TV: Revenge of the Cybermen)
 * The Doctor is aware of UNIT's Black Archive. (TV: The Day of the Doctor)
 * Jackie is familiar with regeneration. (TV: The Christmas Invasion)