Big Finish’s 60th anniversary blockbuster, Doctor Who: Once and Future, continues with today’s release of The Martian Invasion of Planetoid 50.  The latest of this multi-era series continues with the Tenth Doctor (David Tennant) and Missy(Michelle Gomez) leading an all-star cast that features the Paternoster Gang – Madame Vastra (Neve McIntosh), Jenny Flint (Catrin Stewart) and Strax (Dan Starkey).

Written by Jonathan Barnes, the scriptwriter was thrilled to combine some classic sci-fi element in his latest story. “I always try to include a personal element in my stories so I was pleased to be able to write a sort of love letter to the work of HG Wells as well as the required ingredients.  It’s a commentary on fandom, too in some ways. The Doctor lands on a planet which seems to have been remodelled as an exact replica of the fictional London in Wells’s War of the Worlds… but who could be responsible for such devilry? Well, check out the front cover!”

“Hopefully, there are a few surprises along the way too…”

Doctor Who – Once and Future: The Martian Invasion of Planetoid 50 is available now to own as a single-disc collector’s edition CD (+ download for just £10.99), or digital download only (for just £8.99), exclusively from

The Once and Future series is released monthly, with the first seven parts materialising between May and October 2023, and a final coda in November 2024.

A special edition series bundle, which contains extended behind-the-scenes extras and music suites for each story, is also available to pre-order for just £62 (as a digital download only).  The Once and Future special edition CD bundle was limited to 3,000 pressings and sold out in record time, before a single story in the series was released.


  • Duration: 75 minutes.
    Released: 12 September 2023, exclusively from the Big Finish website.
    Director: Ken Bentley
    Writer: Jonathan Barnes
  • Script Editor: Matt Fitton
  • Producer: David Richardson
  • Executive Producers: Nicholas Briggs, Jason Haigh-Ellery

The First Doctor arrives in Victorian London amid a Martian invasion. But he discovers all is not what it seems when Missy appears…

Soon, the Doctor is propelled into a future incarnation – the Tenth – but he is not alone in battling Missy and her Martian invaders. The Paternoster Gang – Madame Vastra, Jenny Flint and Strax – are also here to assist. But can they offer the Doctor any help in solving his own degeneration mystery?

Doctor Who: Once and Future - The Martian Invasion of Planetoid 50
Doctor Who: Once and Future – The Martian Invasion of Planetoid 50


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