A first-look trailer for the Doctor Who spin-off, The War Between The Land And The Sea was released.

Russell T Davies, Showrunner, Writer and Executive Producer says: “The excitement is beginning to build, as the Whoniverse expands. I can’t wait for people to see this magnificent cast in such a powerful, vital, epic story. Look to the seas!”

New character imagery was released of Russell Tovey as Barclay and Gugu Mbatha-Raw as Salt.

Previously announced cast members are Jemma Redgrave, Alexander Devrient, Ruth Madeley, Colin McFarlane, Adrian Lukis, Patrick Baladi, Francesca Corney, Mei Mac, and Vincent Franklin. Additional guest stars who can be spotted in the trailer are Waleed Hammad, Iestyn Arwel, Hannah Donaldson, Manpreet Bachu, and Ann Akinjirin.

Also known to have roles in the series are John Addison, Stewart Alexander, Teri Ann Bobb-Baxter, Fia Hadeed and Barbara Probst.

The premise of the spin-off covers how UNIT (Unified Intelligence Taskforce) copes when the Doctor isn’t around. The Sea Devils, a fearsome ancient race that have been slumbering beneath the oceans, wake up to see the polluted state of the oceans. Emerging from the sea, they dramatically reveal themselves and commence war on humankind. An international crisis is triggered. With the entire population at risk, UNIT step into action as the land and sea wage war on an epic scale.

The series was created by Doctor Who Showrunner and Executive Producer Russell T Davies, who has written the series with Executive Producer Pete McTighe. It is produced by Bad Wolf with BBC Studios for the BBC and Disney Branded Television.

The War Between the Land and the Sea will transmit on BBC iPlayer and BBC One in the UK, and exclusively on Disney+ outside of the UK (where available). While the trailer says “coming soon”, several sources have said the five-part series will begin transmission later this year.