When the Doomwatch team investigates the mass-destruction of wildlife in Somerset, Toby is dismayed to learn that the person seemingly responsible is his old tutor, Ellis. But closer examination uncovers the fact that Ellis is being slowly forced out of his job by American 'de-training' methods, and soon the finger of suspicion is pointed squarely at the company he works for, and his boss, Mitchell.
Original Broadcast Date 20th April 1970