They’re the guardians of the Solar System and Earth’s first line of defence. But now the agents of the Space Security Service face their greatest ever threat… 

Anya Kingdom (Jane Slavin) and Mark Seven (Joe Sims) of the Space Security Service, last encountered in the popular Dalek Universe series, return for their own adventures in June 2025. Inspired by the worlds created by Terry Nation for his 1960s Doctor Who serials, these new stories follow the interplanetary agents on dangerous and thrilling missions. 

The Space Security Service audio series begins with an episode set in 1980s London, as Anya once again takes on the identity of Constable Ann Kelso, as she did throughout several episodes of the Fourth Doctor Adventures range. This time, she’s well aware of her true identity, as she and Mark Seven are on the trail of an alien menace – the Voord. 

In the following two adventures, the SSS agents travel across the stars in pursuit of a renegade Thal scientist, and strive to keep the peace on a planet on the brink of war. 

Space Security Service: The Voord in London is now available to pre-order for just £19.99 (as a digital download to own), exclusively here. 

The three episodes in this box set are: 

The Voord in London by LR Hay 

1980s London. WDC Ann Kelso is assigned to CID, helping to clean up the streets. But “Ann” is really SSS Agent Anya Kingdom from the 41st century, on a top-secret mission to track down aliens hiding in the past. But then she finds a different group of aliens hiding in the Thames – with very deadly intentions… 

The Thal from G.R.A.C.E. by Felicia Barker 

As their investigations continue, SSS agents Anya Kingdom and Mark Seven journey to a planet colonised by Thals. They’re in pursuit of a Thal scientist who has perfected an experimental new weapon… But soon they are the targets… 

Allegiance by Angus Dunican 

The lush planet Othrys is on the cusp of civil war. SSS agents Anya Kingdom and Mark Seven are meant to keep a low profile while on a diplomatic mission there… But when a pregnant surrogate for the Othryn royal family desperately asks for their help, they’re unable to refuse… 

Writer LR Hay said: “It was hugely exciting to be involved in shaping a completely new series, and script editor John Dorney pitched it as James Bond in space, so how could I resist? David Richardson said that he really liked the idea of bringing back Ann Kelso, maybe this time in a 1980s setting, because he wanted to explore the Life on Mars vibe, which had not really been dug into when we first met Ann, and I just loved that idea. 

“So, Constable Ann Kelso is back in 20th century London, but this time she knows that she is really space security agent Anya Kingdom. We have all the fun and games you would expect of a time traveller parachuted into the 1980s Metropolitan Police. She has back up in her own time in the form of Mark Seven, and they are well aware how crucial their mission is, but as things progress, they start to suspect that there is even more going on.” 

Director Barnaby Kay added: “It was lovely to bring Anya and Mark back into this great new series. It’s really exciting stuff, and Joe Sims and Jane Slavin are just fabulous. They know what they’re doing, they know their characters way better than I do, and they’ve been so responsive and have clearly enjoyed bringing these characters back. 

“One of the pleasures of doing these stories is going all over the universe and meeting all these extraordinary characters. I love the bouncing around, messing about in space – who knows where they’ll jump next?” 

Big Finish listeners can save money by pre-ordering The Voord in London with the second volume of Space Security Service (due January 2026) in a multibuy bundle for just £38 (download to own), 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 August 2025.