Norman Scott married Susan Myers in 1969. The wedding was followed by a small wedding reception at French restaurant L'Artiste Affame. Scott's mother-in-law, sister-in-law and brother-in-law declined to attend the wedding and Susan's father did indeed deliver a scathing speech.
According to evidence heard in court, Andrew Newton did in fact spend two days searching for Norman Scott in the wrong town. He went to Dunstable, Bedfordshire, instead of Barnstaple, Devon; the towns are located over 200 miles away from each other.
According to producers, the scene, in which Norman Scott's dog is killed, had to be approached in such a way that the dog performance wasn't compromised. The scene was filmed with and without the use of a rain machine, with rain added digitally in post-production for shots that included the Great Dane. It took three nights to film the entire sequence.
Several people who knew the real Emlyn Hooson, who later became Lord Hooson, have complained about the inaccuracy and unfairness of the unflattering portrait of him by Jason Watkins in this mini-series. The episode briefly refers, with no elaboration, to his most famous (or notorious) case as a barrister, when he defended Ian Brady, who was convicted as a serial killer of children in the 1960s.
Hugh Grant has said it was initially difficult, to figure out what mindset could lead his character, Jeremy Thorpe, to seriously pursue murder as a solution to his problems. However, after considering the threat Scott's revelations posed to the happiness of Thorpe's wife and son - whom he appeared to genuinely love - he understood what could motivate his character's actions.