Overview

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.

Cast

Russell Tovey

Barclay Pierre-Dupont

Gugu Mbatha-Raw

Salt

Jemma Redgrave

Kate Lethbridge-Stewart

Ruth Madeley

Shirley Bingham