UNIT’s Eras tour

UNIT. Humanity’s first and best line of defence against a hostile universe. No matter where. No matter when. 

Since its foundation in the mid-20th century, UNIT, the Unified Intelligence Taskforce, has been protecting the Earth from alien threats. Often they have aid from the Time Lord known as the Doctor, but sometimes they have to rely on their own expert personnel and high-tech resources. 

A brand-new audio series, UNIT Eras, will highlight heroes from across the history of the organisation, beginning with a four-episode anthology, Hostile Universe. 

This box set will comprise brand-new adventures starring Brigadier Lethbridge-Stewart (Jon Culshaw), his daughter Kate Stewart (Jemma Redgrave), Osgood (Ingrid Oliver), Sarah Jane Smith (Sadie Miller), and Harry Sullivan (Christopher Naylor). 

It will also feature the Big Finish debut of Colonel Mace (Rupert Holliday-Evans) from 2008 Doctor Who story The Sontaran Stratagem/The Poison Sky, as well as the first Big Finish audio episode set during the Fifteenth Doctor’s era of the show. Melanie Bush (Bonnie Langford) and the Vlinx (Nicholas Briggs) star in this adventure, as UNIT’s skyscraper HQ is sent into lockdown. 

The Worlds of Doctor Who – UNIT Eras: Hostile Universe is now available to pre-order as a digital download to own for just £24.99, exclusively here. 

The four episodes in this box set are: 

Rise of the Valiant by Andrew Smith 
The Indigo Child by Ken Bentley 
The Life and Death of Private Eddie Wise by Hannah Kennedy 
Deadstar by Joshua Pruett and Jonathan S Powell 

Producer Heather Challands said: “UNIT has long been a reliable, exciting and ever-evolving part of the world of Doctor Who. It's one of my favourite parts, showcasing the flaws and triumphs of human nature through iconic characters such as the Brigadier, Osgood, Harry Sullivan and Kate Stewart. 

“I was thrilled by the opportunity to delve deeper into times when the TARDIS isn’t around and the Doctor's friends simply have to do the best that they can against impossible odds. This new range is an anthology series, with each story standing alone, going from the 1970s right up to the 2020s, to see how much UNIT has changed in its long history. 

“Hostile Universe features a close encounter with Daleks during The Stolen Earth, finds the Vlinx feeling a bit frosty, shows the toll UNIT takes on some of its soldiers, and answers the question of how Kate Stewart was spending her time after her house was blown up!” 

The Worlds of Doctor Who – UNIT Eras: Hostile Universe is now available to pre-order as a digital download to own for just £24.99, exclusively here. 

All the above prices (including pre-order and multibuy bundle discounts) are fixed for a limited time only and guaranteed no later than 30 June 2026. 

SALE ENDING SOON! For a very limited time, save 25% on selected audio dramas with checkout codes LAND or SEA. Starring Jemma Redgrave, Nicholas Courtney, Angela Bruce and more. Click here to find out how to save. 

Sale ends no later than 23:59 (UK time) on 22 December 2025.