Dangerous Knowledge (1976)

Name: Dangerous Knowledge
Genre: Thriller
Rating: 7.1
Cast: John Gregson, Prunella Ransome, Patrick Allen, Ruth Trouncer, Ralph Bates

Thriller

A gritty six-part mystery thriller serial from 1976, starring John Gregson as Bill Kirby. Bill is an insurance salesman travelling back to the UK from France. Accompanied by Laura Marshall (Prunella Ransome), he has to evade the two armed agents that are following him. A series of murders follow and Bill tries to unmask who's behind them.

IMDb rating: 7.1 (76 votes)
Episode average: 7.1 matches the IMDb rating
Seasons: 1
Language: EN
Type: TV series

Rating trend: this show's seasons do not settle into one shape. Rising Shows ranks whole shows by the shape of their rating trend rather than one average score, which is how you find a show that got better rather than a show that started well.

Browse shows by rating shape → Open in Rising Shows app → View on IMDb

Ratings refreshed Oct 3, 2026 · 1 season indexed

Cast

Seasons

Season 1 (1976)

7.12 avg 6 episodes 6.7 → 7.8

Big finale

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	Comprehensive Cover	6.7	11
2	A Deadly Policy	7.1	7
3	Clause for Concern	6.9	8
4	Death Risk	6.8	8
5	Surrender Value	7.4	7
6	Dividends	7.8	5