Earth’s greatest defenders face the Ice Warriors in November with UNIT: Nemesis

As exclusively revealed in Doctor Who Magazine issue 562, Kate Stewart and her team are back! And they’re up against bigger threats than ever before in UNIT: Nemesis from Big Finish. Prepare to meet enemies ancient and modern in these full-cast audio dramas. Including the Ice Warriors, in a tale which sees the UNified Intelligence Taskforce encounter Doctor Who’s military Martians for the first time. With the first volume set for release in November 2021, UNIT: Nemesis marks a brand-new era for the UNIT team and the beginning of a new four-box-set arc of adventures.

Old favourites and new faces will team up from stations across the globe. The team returns, including Kate Stewart (Jemma Redgrave), Osgood (Ingrid Oliver), Josh Carter (James Joyce), Jacqui McGee (Tracy Wiles).  And now 1970s Doctor Who companion Harry Sullivan (Christopher Naylor) and Naomi Cross (Eleanor Crooks) join them!

Christopher Naylor joins the team as 70s companion Harry Sullivan! (c) Big Finish Productions
Christopher Naylor joins the team as 70s companion Harry Sullivan! (c) Big Finish Productions

A new start and a new era for UNIT

Co-producer Emily Cook said: UNIT: Nemesis is like UNIT’s version of Avengers: Assemble! UNIT UK and UNIT Australia join forces in an encounter with the Ice Warriors. Meanwhile, as usual, UNIT is investigating the unexpected… On a submersible off the west coast of Scotland, marine biologist Professor Adam Merchant discovers a large stone arch, which has apparently been buried for millions of years. Where has this mysterious arch come from? And where does it lead to? UNIT is on the case! Unfortunately, someone else is too…”

Co-producer David Richardson added: “A new start, a new era for UNIT. And the beginning of a sixteen-part epic that will see the return of a number of popular monsters. But what is young Harry Sullivan doing here in the 20th Century? And who is his colleague Naomi Cross? UNIT: Nemesis is an important piece of a jigsaw puzzle that has been planned for some time, and a storyline that will last over the coming years.”


Ingrid Oliver and Jemma Redgrave return as Osgood and Kate in UNIT: Nemesis (c) Big Finish Productions Doctor Who
Ingrid Oliver and Jemma Redgrave return as Osgood and Kate in UNIT: Nemesis (c) Big Finish Productions

UNIT: Nemesis 1

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…


UNIT – Nemesis 1 is now available to pre-order as a collector’s edition CD (for just £24.99) or a digital download (for just £19.99) exclusively from

Big Finish listeners can save money by pre-ordering the bundle, containing all four volumes in the UNIT: Nemesis series. Bundles cost just £88 (as a collector’s edition CD) or £79 (as a download).


Please note that Big Finish is currently operating a digital-first release schedule. The mail-out of collector’s edition CDs may be delayed due to factors beyond our control, but all purchases of this release unlock a digital copy that can be immediately downloaded or played on the Big Finish app from the release date.


  1. Please explain how Harry Sullivan ended up in this series when he should be an elderly, retired person now as he was last seen back in the 1970s. It was never explained in the Unit Nemesis series as he just showed up in Australia.

    • You’ll have to wait for a forthcoming Fourth Doctor Adventures box set for the exact circumstances, but we can tell you that subsequent box sets (particularly “Seventh Doctor Adventures: Sullivan and Cross – AWOL”) do give the essentials of how and when Harry wound up working for 21st century UNIT.


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