Doctor Who has confirmed its all-new spinoff The War Between the Land and the Sea will star Russell Tovey and Gugu Mbatha-Raw.

The major castings were announced during Doctor Who's Comic-Con panel on Friday (July 26), along with the confirmation that Doctor Who cast members Jemma Redgrave and Alexander Devrient will cross over to the spinoff as UNIT boss Kate Lethbridge-Stewart and Colonel Christopher Ibrahim, respectively.

Doctor Who showrunner Russell T. Davies has penned the five-part series with Pete McTighe (A Discovery of Witches).

Here's the official synopsis: "When a fearsome and ancient species emerges from the ocean, dramatically revealing themselves to humanity, an international crisis is triggered. With the entire population at risk, UNIT step into action as the land and sea wage war."

russell t davies at the doctor who premiere
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Showrunner Russell T Davies

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While the synopsis doesn't mention humanity's enemy by name, it was previously reported this spinoff would feature Sea Devils, who were most recently seen in Doctor Who in 2022.

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Russell Tovey and Gugu Mbatha-Raw's characters have not been named yet either, but both have previously appeared in Doctor Who.

Tovey played the heroic Midshipman Alonso Frame in the David Tennant-era Christmas special 'Voyage of the Damned', before returning for a cameo in 'The End of Time'.

Mbatha-Raw made recurring appearances throughout Doctor Who's third season in 2007 as companion Martha Jones' sister Tish.

russell tovey in doctor who 'voyage of the damned'
BBC

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Russell T Davies has said of The War Between the Land and the Sea: "I’m so lucky to work with such a magnificent cast. And this is a huge, muscular, thrilling drama which will shake The Whoniverse to its foundations. When The Doctor’s not in town, the whole of humanity is in trouble.”

"The War Between The Land and The Sea is another utterly unique and gripping drama from Russell T Davies and we’re delighted to welcome the show to The Whoniverse," Lindsay Salt, BBC Director of Drama, said.

"Featuring a stellar cast, with Russell Tovey and Gugu Mbatha-Raw taking on leading roles, this brand new epic mini-series will leave audiences on the edge of their seats as they watch UNIT take on one of their biggest battles to save humanity.”

Doctor Who also unveiled the first look at its 2024 Christmas special during the panel, thus confirming a classic monster will return.

Doctor Who airs on BBC One in the UK and Disney+ elsewhere. Classic episodes of Doctor Who are available on BBC iPlayer in the UK.

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