- This BBC-TV series first aired in 1975 and ran for 13 episodes.
- Michael Jayston (Quiller), Moray Watson & Sinead Cusack starred.
- The first episode was a pretty faithful version of The Tango Briefing. The remaining episodes were based on original scripts.
- The shows did not maintain the spirit of Adam Hall's Quiller novels and have not been shown since. (Keiran O., David B. & Halliwell's TV Companion)
The Book Tie-in