For a limited time only, get discounts on UNIT releases from Big Finish, including individual stories and box sets from two UNIT ranges. 

Featuring the United Nations Intelligence Taskforce, and starring many familiar names, including Nicholas Courtney, Angela Bruce. Richard Franklin, John Levene, Katy Manning, Jemma Redgrave and Ingrid Oliver, these releases feature a collection of terrifying adversaries, including the Sea Devils, Autons, Silence, Wirrn and Cybermen. 

Choose any of the releases from the classic UNIT range page or the UNIT – The New Series range page and make sure you use either of the two checkout codes, LAND or SEA, when prompted to get 25% off qualifying purchases. 

The sale expires at 23:59 (UK time) on 22 December 2025, after which we will reveal the most-used checkout code. So pick your favourite to win this particular war between the land and the sea. 

Titles in the sale include:

UNIT: Extinction.

Joined by her assistant Osgood (Ingrid Oliver), Colonel Shindi (Ramon Tikaram), Captain Josh Carter (James Joyce) and Lieutenant Sam Bishop (Warren Brown), UNIT: Extinction pits Kate Lethbridge-Stewart (Jemma Redgrave) against the might of the Nestene Consciousness (Nicholas Briggs) and its army of plastic Autons.

UNIT – Brave New World: Seabird One

The Cold War is over, the Millennium is fast approaching, and Brigadier Winifred Bambera (Angela Bruce) is the new head of UNIT. But in this shadowy, unpredictable world of deadly threats and hidden enemies, Bambera and her new team – Sergeant Jean-Paul Savarin (Alex Jordan) and Dr Louise Rix (Yemisi Oyinloye) – will need to prove their mettle. The stakes are higher than ever.

UNIT: Assembled

Kate Stewart and her UNIT team investigate and confront alien attacks on the planet Earth. Something is stirring, an old foe to those in UNIT with a long memory. And fortunately, to face an old foe... There are old friends, including Jo Grant (Katy Manning), Mike Yates (Richard Franklin) and John Benton (John Levene). 

UNIT: Nemesis

An ancient artefact, a stone arch anachronistically imbedded with electronic circuitry, is recovered following a rupture in an undersea stretch of the Mull lava group in North West Scotland, a geological feature dating from tens of millions of years ago.

UNIT's investigation will unlock a link to another world and bring them face to face with a new and powerful threat...

Here are Jemma Redgrave and Ingrid Oliver answering listeners' questions about the UNIT series.