Casualties of Time (audio story)

 was the eighth and final story in the fifth series of The Fourth Doctor Adventures, produced by Big Finish Productions. It was written by Nicholas Briggs and featured Tom Baker as the Fourth Doctor, Lalla Ward as Romana II, John Leeson as K9 Mark II, David Warner as Cuthbert, Toby Hadoke as Mr Dorrick, David Troughton as The Black Guardian and Jez Fielder as The White Guardian.

It was the second part of the series finale, following on from The Pursuit of History.

Publisher's summary
The TARDIS crew have unknowingly become embroiled in a web of deceit. A trap has been laid across time and they have no possible means of escape. Destiny has ensnared them.

The Doctor is finally getting the chance to see the Conglomerate's work at first hand. Romana is working to save the alien Laan once and for all. K9 is returning to Ancient Britain in search of an unusual power source.

The Doctor, Romana and K9.

Today one of them will die.

Plot
to be added

Cast

 * The Doctor - Tom Baker
 * Romana - Lalla Ward
 * K9 / The Oortag - John Leeson
 * Cuthbert - David Warner
 * Mr Dorrick - Toby Hadoke
 * The Black Guardian / Edge - David Troughton
 * Drudger / Ecidien Cerebus Bird / The White Guardian / Salonu Prime - Jez Fielder
 * The Laan / Salonu - Jane Slavin
 * Conglom-net Computer - Lisa Bowerman

Continuity

 * There are two major power blocs on Earth in the late 21st century. (TV: Warriors of the Deep)
 * Romana explains that because he's been travelling in time longer than her, the Doctor's artron energy would be much stronger. (TV: The Deadly Assassin)
 * The Black Guardian again shows carelessness for a few lives compared to the majority. (TV: The Armageddon Factor)
 * The Black Guardian cannot be seen to act in person. (TV: Mawdryn Undead)
 * The Black Guardian claims that the time travellers' attempts to elude him had no effect, (AUDIO: The Auntie Matter, Wave of Destruction) and that he's been watching them. (PROSE: The Well-Mannered War)
 * The Ecidien Cerebus Bird says "the time is approaching" and drags the Doctor into the TARDIS. (AUDIO: The Pursuit of History)
 * The Doctor explains the Bird is connected to the telepathic circuits, (TV: The Time Monster et al) and has access to his symbiotic nuclei. (TV: The Two Doctors)