Two years have passed since the Nestene creature vanished from UNIT's top secret Warehouse... Suddenly and without warning the Nestene strikes, once again using Autons as its deadly foot soldiers. As mysterious UNIT operative Lockwood struggles to unearth the Nestene plan, he finds himself drawn to remote Sentinel Island. There, the population have been caught up in a bizarre frenzy of religious activity. Lockwood is joined by Natasha Alexander, a new scientific advisor with her own, sinister agenda. To defeat the Nestene menace they must both face the terrifying power of a creature from before the dawn of Mankind...
| Actor | Role |
|---|---|
| MMichael WadeLockwood | Lockwood |
| GGeorge TelferWinslet | Winslet |
 Jo CastletonNatasha Alexander | Natasha Alexander |
| AAndrew FettesSergeant Ramsay | Sergeant Ramsay |
| JJohn WadmoreColonel Wilson | Colonel Wilson |
| BBryonie PritchardDr Sally Arnold | Dr Sally Arnold |
| WWarren HowardDaron | Daron |
| PPatricia MerrickCharlotte | Charlotte |
| DDavid RowstonDave | Dave |
 Nicholas BriggsMike | Mike |
| JJohn HawkinsHardgraves | Hardgraves |
| JJohn HansellDavis | Davis |
| SStephen BradshawU.N.I.T. Soldier | U.N.I.T. Soldier |
| MMark MooreU.N.I.T. Soldier | U.N.I.T. Soldier |
| GGabriel MykajU.N.I.T. Soldier | U.N.I.T. Soldier |
| BBlaine CoughlanAuton / UNIT soldier | Auton / UNIT soldier |
| LLorraine MalbyVillager | Villager |
| JJayson BridgesUNIT Soldier | UNIT Soldier |
| KKeith BrooksUNIT Soldier | UNIT Soldier |
| VVaughan GrovesUNIT Soldier | UNIT Soldier |
| RRichard SmithUNIT Soldier | UNIT Soldier |
| MMatthew BradfordVIllager | VIllager |
| IIan TaylorVillager | Villager |