The Twilight Kingdom (audio story)

 was the fifty-fifth monthly Doctor Who audio story produced by Big Finish Productions. This is writer Will Shindler first audio story and first contribution to Doctor Who.

Publisher's summary
The blood of innocents has been spilt -- a terrible sequence of events has been set in motion. The forces of darkness are on the move.

Deep underground, an army of light prepares itself for the oncoming war.

The Doctor's used to winning. Stumbling in, reading the face of the enemy, and then beating the odds... but what if this time he's got it wrong? Charley and C'rizz think he has.

Stripped of all that is familiar, just who is the Doctor? Major Koth thinks he knows.

Lost among the dark caverns of an unknown world, has the Doctor finally met his match?

Plot
to be added

Cast

 * The Doctor - Paul McGann
 * Charley Pollard - India Fisher
 * C'rizz - Conrad Westmaas
 * Major Koth - Michael Keating
 * Byzar Janto - Alan Rothwell
 * Commander Vayla - Ann Carus-Wilson
 * Sub-Commander Quillian - Dale Ibbetson
 * Sergeant Bryn - Jeremy James
 * Captain Tysus - Vivien Parry
 * Tarrith Koth - Alison Sterling
 * Lieutenant Fraxin - Nicholas Briggs
 * Lieutenant Deral - Stephen Fewell
 * Corporal Orvik - Gary Russell
 * The Kro'ka - Stephen Perring

The Doctor

 * The Doctor is over a thousand years old.

Diseases and illnesses

 * Kestila sickness is ultimately fatal. Early symptoms include fever, vomiting and sores.

Species

 * Grelligs resemble rats and were brought to Setarus by Koth.

Continuity

 * The Doctor claims that he is on a quest to find Rassilon, who he later finds in BFA: The Next Life.
 * The Doctor previously referred to Koth shortly after Charley and he entered the Divergent Universe, though paradoxically he did not know who he was at the time. (BFA: Scherzo)