Gugu Mbatha-Raw, Russell Tovey, Jemma Redgrave and Alexander Devrient have signed on to star in a Doctor Who spin-off for the BBC and Disney+. "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 steps into action as the land and sea wage war," the networks said in a synopsis Friday. The five-part ...