Singularity (audio story)

 was the seventy-sixth monthly Doctor Who audio story produced by Big Finish Productions. It was the third audio story to feature the Fifth Doctor and Vislor Turlough. It was released in November 2005, four years after Mark Strickson had appeared in the audio story Loups-Garoux.

It was the last story to feature only the Doctor played by Peter Davison and Turlough played by Mark Strickson together until The Memory Bank was released in 2016. However, there were many stories released within the 11 year gap which featured the Doctor travelling with Turlough, Nyssa and Tegan Jovanka.

Publisher's summary
Russia, the near future.

The Somnus Foundation knows the fate of mankind; they promise a tomorrow where humanity will evolve into a godlike form of infinite power. They will lead us there, to a destiny that spans the stars. This is how the future will unfold.

The Doctor knows the fate of mankind; the human race is destined to fight and struggle for their very existence, to survive disaster and war and carve an empire from an unforgiving universe. He has seen it with his own eyes. This is how the future will unfold.

Beneath the towering headquarters of the Somnus, in the streets of Moscow a dark power is building, and a conspiracy that stretches across eternity is nearing completion.

Time is fracturing and the Doctor and Turlough are at the heart of the chaos. History is about to change and the galaxy will burn in its wake...

Plot
to be added

Cast

 * The Doctor - Peter Davison
 * Turlough - Mark Strickson
 * Qel - Eve Polycarpou
 * Seo - Maitland Chandler
 * Cord - Michael Cuckson
 * Lena Korolev - Natasha Radski
 * Alexi Korolev - Oleg Mirochnikov
 * Pavel Fedorin - Max Bollinger
 * Natalia Pushkin - Dominika Boon
 * Tev - Billy Miller
 * Xen - Marq English

Continuity

 * Turlough suspects that another time corridor, such as the one which linked London in 1984 to the Prison Station at some point in the future, may be at work. (TV: Resurrection of the Daleks)
 * Pavel's conspiracy theory files include a photograph of a Yeti (TV: The Abominable Snowmen, The Web of Fear) and Tartokovsky's theory on N-Space (AUDIO: The Ghosts of N-Space).
 * Tired of Russia's climate, Turlough wishes to visit "somewhere tropical; sunny beaches and pretty girls. (TV: Planet of Fire)
 * Attempts by time travelling humans from the far future to kill their ancestors also occurred in London in the 1890s (AUDIO: The Spirit Trap) and all over Earth in 2008 (TV: The Sound of Drums).
 * The Doctor again uses his Molenski Univarius. (AUDIO: The Axis of Insanity)
 * The Doctor encounters birds that have been used to attack him. (AUDIO: Plague of the Daleks)