The Doctor and Sarah return to Earth in the present day to find a strangely deserted village and woods stalked by white-clad figures.
| Actor | Role |
|---|---|
 Tom BakerThe Doctor | The Doctor |
 Elisabeth SladenSarah Jane Smith | Sarah Jane Smith |
 Milton JohnsGuy Crayford | Guy Crayford |
 Peter WelchMorgan | Morgan |
| MMartin FriendStyggron | Styggron |
 Max FaulknerCpl. Adams | Cpl. Adams |
| DDave CarterGrierson | Grierson |
 Ian MarterHarry Sullivan | Harry Sullivan |
 Roy SkeltonChedaki | Chedaki |
 John LeveneRSM Benton | RSM Benton |
| SStuart FellKraal | Kraal |
 Patrick NewellCol. Faraday | Col. Faraday |
| HHugh LundMatthews | Matthews |
 Heather EmmanuelTessa | Tessa |