Ransome manages to escape from the plastics factory and alert UNIT, prompting the Doctor and the Brigadier to start an investigation.
Quest roles:
Nicholas Courtney(Brig. Lethbridge-Stewart), Hugh Burden(Channing), John Breslin(Captain Munro), Neil Wilson(Sam Seeley), Hamilton Dyce(Major General Scobie), Derek Smee(Ransome), John Woodnutt(Duke of Forgill), Betty Bowden(Meg Seeley), Clifford Cox(UNIT Sergeant)