The Brink of Death (audio story)

 was the last full cast audio story in the The Sixth Doctor: The Last Adventure audio anthology released in 2015 by Big Finish Productions. It serves as the final chronological story for the Sixth Doctor played by Colin Baker, filling in a critical missing piece of the Doctor's existence and leading directly into the 1987 television story Time and the Rani.

It is prominent for depicting the events leading up to the Sixth Doctor's regeneration into the Seventh Doctor for the first time on performed media with the original actors, and the second attempt overall, following 2005's Spiral Scratch.

Publisher's summary
The Doctor and Mel face the final confrontation with the Valeyard - and the Doctor must make the ultimate sacrifice.

Plot
to be added

Cast

 * The Doctor - Colin Baker
 * Melanie Bush - Bonnie Langford
 * The Valeyard - Michael Jayston
 * Genesta - Liz White
 * Coordinator Storin/Nathemus 1 - Robbie Stevens
 * Lorelas/Nathemus 2 - Susan Earnshaw
 * The Seventh Doctor - Sylvester McCoy

Continuity

 * Another version of the Sixth Doctor's regeneration posits that he absorbed chronon energy in the Spiral Chamber. (PROSE: Spiral Scratch)
 * The Doctor toasts the companions of his incarnation: Peri, Mel, Evelyn, Flip, Mila, Constance and "all the others". The Eighth Doctor would do similar prior to his regeneration. (TV: The Night of the Doctor)