The KVI. Outside the Kremlin, beyond the President. A secret institute created by his majesty Tsar Nicholas II to defend the Motherland from unknowable evil. The 20th Century changed everything – but the KVI are still ready...

Based on the beloved Doctor Who spin-off series created by Russell T Davies, Big Finish's range of Torchwood audios continues the legacy of Earth's greatest defenders, with new stories set in and around the original TV show.

Continuing our second series of audio dramas, Torchwood: Zone 10 sees the return of Naoko Mori as Toshiko Sato – and sees her voyage to the wastelands of Russia...

They call it "Pulse" - a radio signal which has puzzled the world for 40 years. But now Toshiko Sato has solved it.

She's uncovered a message which leads her to Russia, and into an uneasy alliance with the KVI - the Russian equivalent of Torchwood. Toshiko needs to get into Zone 10 - a frozen wasteland which officially doesn't exist.

An intergalactic war was once fought in Zone 10. And it turns out there's a survivor.

Written by David Llewellyn, and starring Naoko Mori, Krystian Godlewski, Ella Garland and Geoffrey Breton, Torchwood: Zone 10 introduces powerful new players into the Torchwood mythology – and a danger that will plague the team for years to come...

Torchwood: Series 2 begins in March with the release of Torchwood: The Victorian Age – starring John Barrowman as Captain Jack Harkness and Rowena Cooper as Queen Victoria.

Further releases include the return Tom Price as Sergeant Andy in Torchwood: Ghost Mission and Indira Varma as Suzie Costello in Torchwood: Moving Targets. Two further releases will be announced at a later date.

You can subscribe to the whole of Series 2 today at the special introductory rate of £45 on CD and £40 to download (this price being held through to March 31st 2016).

Series 1 is also available as a single, money-saving bundle today; including the recently released series finale Torchwood: More Than This. And remember, when you choose to buy this release on CD directly from Big Finish, you will also unlock instant access to a digital copy for download.