The Last Line (audio story)

 was the fourth and final story in the audio anthology Self-Defence, produced by Big Finish Productions. It was written by Lizzie Hopley and featured Derek Jacobi as the War Master and David Tennant as the Tenth Doctor.

Publisher's summary
At the mercy of an ancient and powerful race, the Master calls upon his oldest friend in his hour of need. The problem is he doesn't recognise this incarnation of the Doctor... while the Doctor knows this Master all too well.

Plot
to be added

Cast
to be added
 * The Master - Derek Jacobi
 * The Doctor - David Tennant

Continuity

 * The Master recites the first few lines of the Zagreus rhyme, before he is cut off by The Doctor. (AUDIO: Zagreus)
 * The Master claims metaphorically that there is "always bit of me inside your head", which the Doctor replies "Yeah that New Year's Eve has a lot to answer for", referring to an attempt by an earlier incarnation of The Master to take The Eighth Doctor's body and lives on New Year's Eve 1999. (TV: Doctor Who)
 * The Doctor explains that he briefly met this incarnation of the Master "a while back" and that the latter had "moved on quickly". (TV: Utopia)