The Doctor and Sarah return to Earth in the present day to find a strangely deserted village and woods stalked by white-clad figures.
Tom Baker
as The Doctor
Elisabeth Sladen
as Sarah Jane Smith
Milton Johns
as Guy Crayford
Peter Welch
as Morgan
Martin Friend
as Styggron
Max Faulkner
as Cpl. Adams
Dave Carter
as Grierson
Ian Marter
as Harry Sullivan
Roy Skelton
as Chedaki
John Levene
as RSM Benton
Stuart Fell
as Kraal
Patrick Newell
as Col. Faraday
