16-year-old Terry Connor uncovers a secret government plot involving mind control and espionage at a Ministry of Defence facility near his Outward Bound camp.
Terry Connor
Gordon
Mr Buckle
Dr Andrew Jensen
Kurtz
Mr Richards
Alex
Granny Powell
Miss Howard
Jacko
Ron
Police Sergeant
General Hart
Ross
Military Policeman
Dr Verney
Nurse Thompson
Mr Connor
Mrs Connor
Frogman
Caver
Security Man
Radio Announcer (voice)
Farmer
Technician
Bairstow
Potholer
CID Sergeant
Commentator (voice)