David Callan is the top agent/assassin(retired) for the S.I.S. (British counter intelligence), but he is an embittered man who performed his duties under duress. Now pressured into returning to duty Callan reluctantly but efficiently performs the tasks given to him. This espionage drama concentrates on the seamy underside of covert operations: assassinations, blackmail and dirty dealing.
Series Fun Facts
- The Section head always went under the codename of Hunter, AKA Charlie when being contacted from the outside world. Callan's regular alias was David Tucker.
- The Section used a series of colour-coded files. A Red File was for especially dangerous targets of most urgent priority, marked for death. A Yellow File indicated a subject under occasional…
[show]The Section used a series of colour-coded files. A Red File was for especially dangerous targets of most urgent priority, marked for death. A Yellow File indicated a subject under occasional surveillance. Blue Files were for members of the 'wrong' party. White Files were for people who were to be put out of action by sending them into divorce courts, bankruptcy, prison or mental homes.
- David Callan's address in the first two series was: 31 Duke William Street, Bayswater; his later address was: 27 Bransken Terrace, Fulham. Lonely lived at 19 Old Market Street, Shepherds Bush.