The Twilight Kingdom (audio story)

 was the fifty-fifth monthly Doctor Who audio story produced by Big Finish Productions. This is writer Will Shindler's 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

Individuals

 * Some of the things that are in Charley's mind are England and plum pudding.

Diseases and illnesses

 * Kestila sickness is ultimately fatal. Early symptoms include fever, vomiting and sores. It was previously believed to have been eliminated centuries earlier.

Species

 * The Doctor sarcastically claims that complaining is a defect in humans.
 * Grelligs resemble rats and were brought to Setarus by Koth.
 * The Eutermesans are unknown to the Ondrockans.

Planets

 * Ondrokkon has six major continents which are policed by a global defence fleet.

Continuity

 * The Doctor believes that they are getting closer to the missing TARDIS. (AUDIO: Scherzo)
 * Charley once again asks C'rizz to stop referring to her as "Charlotte." (AUDIO: The Creed of the Kromon)
 * It has been two days since the Kro'ka sent the Doctor, Charley and C'rizz from Light City to the jungles of Setarus. (AUDIO: The Natural History of Fear)
 * Charley refers to the Eye of Orion. (TV: The Five Doctors)
 * The Doctor previously referred to Major Koth shortly after he and Charley entered the Divergent Universe, though paradoxically he did not know who he was at the time. (AUDIO: Scherzo)
 * The Doctor refers to mind probes (TV: The Five Doctors) and thumbscrews (TV: City of Death).
 * The Doctor asks Charley if she was "expecting someone else." (TV: The Caves of Androzani)
 * The Doctor claims that he is on a quest to find Rassilon, whom he later finds on the Forge world. (AUDIO: The Next Life)
 * It was the cave creature which brought the TARDIS to Setarus. (AUDIO: Scherzo)
 * This is the first time that C'rizz tries to strangle Charley. He did so again only a week later while under the influence of the 23rd Church of Lucidity in the Multihaven. (AUDIO: Faith Stealer)