Not a TV show as such but just watched a live-streamed performance of Mark Thomas's excellent stage show Cuckooed. It tells the story of his involvement with the activist group Campaign Against the Arms Trade, and their discovery that one of their fellow activists, and long-standing friend, was a spy for BAE Systems.
The stream was followed by live interviews and chat. One of the participants was a man who fell foul of a notorious 10-year blacklisting within the UK construction industry. He and over 3000 others were either sacked prematurely from jobs or denied work altogether due to being classified as "domestic extremists" - which in his case resulted from campaigning for greater standards of safety within the industry. Many other safety campaigners suffered the same fate. People lost homes and marriages, and their mental health suffered, as a result. Eventually the construction companies got taken to court, admitted they'd run the blacklist and paid out millions in compensation.
Another speaker described her 5-year relationship with a man who disappeared, then subsequently was revealed as an undercover cop (married, with 3 kids) who'd been spying on her and a group of fellow anti-racism campaigners, and had formed other similar fake long-term relationships. The Met Police later settled out of court when brought to account.
Believe it or not, as usual with Thomas's shows, a serious topic was well presented but with humour.
I'd seen this one on stage when it originally ran a few years ago and it was good to see it again.