Straight from the new series of Doctor Who, Jemma Redgrave and Ingrid Oliver are back in action as Kate Stewart and Petronella Osgood, as the Unified Intelligence Taskforce go up against the might of the Tengobushi and the scheming Felicity Lyme (Alice Krige)

This new box-set has been released to battlefield glory, with critics saluting this second outing for the Earth's finest. Pick up your copy today and read some of the reviews below:

'If you loved the first UNIT set, you will absolutely love this latest addition to the universe. How could you not enjoy a conspiracy story involving Alien Ninja Warriors?'

Ian Cullen, Sci-Fi Pulse

'This second adventure with Kate Stewart and Osgood is another triumph; superbly combining intelligent plotting from writers Matt Fitton and Andrew Smith with explosive action in a journey across planet Earth.'

9/10, Doctor Who Online

'Exciting, exhilarating and with a proper international feel, this is a fantastic entry to the UNIT files.'

Tim Cundle, Mass Movement

'With the Tengobushi and the alien leader Dokan, Big Finish has added a well-defined and definitely alien race to the mix.'

Tony Jones, Red Rocket Rising

'Jemma Redgrave and Ingrid Oliver remind us just why they were cast as UNIT scientists Kate Stewart and Osgood in this rip-snorter of an audio drama.'

10/10 Chris Gardner, Blogtor Who

'It’s Howard Carter who’s let rip on these though, and the sound design is once again spot on – the dialogue is used just as much as is needed to clarify any storytelling point.'

9/10 , Paul Simpson, Sci-Fi Bulletin

'To have large pitched battles that don't just sound like a collection of sound effects is an art in itself, and this is achieved here. A great box-set.'

Tin Dog Podcast

UNIT: Shutdown can be bought today for £20 on both CD and to download with a complimentary digital copy included with CD orders. Listen straight away using the official Big Finish Player app, now available on iOS devices.

The box-set can also be enjoyed as part of the UNIT: The New Series bundle, which includes the already release UNIT: Extinction and two upcoming instalments, including November's UNIT: Silenced.