by David Llewellyn
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.
Naoko Mori (Toshiko Sato), Krystian Godlewski (Maxim Ivanov), Ella Garland (Anna Volokova), Geoffrey Breton (FSB Agent)
Directed by Scott Handcock
Release date: April 2016
*Featuring Toshiko Sato
*A Big Finish 'Torchwood' audio production
*Time-placing: this story occurs after the events of 'Uncanny Valley', and is set in 2008, placing it during Season 2