Undermind - episode 1 (1965) | Jeremy Wilkin & Rosemary Nicols | Sci-fi/mystery

Personnel Officer Drew Heriot returns to the United Kingdom after working in Australia to discover his brother, Police Detective Frank Heriot, behaving oddly, to the distress of his sister-in-law Anne. Investigating together, they discover that a disembodied alien force is using high frequency signals to brainwash people – including Drew's brother – into committing subversive acts as a prelude to a full-scale invasion. Together, Drew and Anne battle to stop the acts of sabotage while trying to alert Britain to the danger. "Instance One": Police Detective Frank Herriot has attacked a member of Parliament and otherwise behaves strangely. His brother Drew and estranged wife Anne try to understand with the help of a psychiatrist, but he - the psychiatrist - is soon murdered. Series playlist: https://www.youtube.com/playlist?list=PLBhWllxOAdhagdE3rDTWXjhmWtGJEmoqi Broadcast 8th May 1965