Every season of Dangerous Knowledge ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Dangerous Knowledge!

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.

The Best Seasons of Dangerous Knowledge

Every season of Dangerous Knowledge ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Dangerous Knowledge!