On 3 January 2023, PBS will be airing Season 35, Episode 1 of the history series, American Experience (https://www.youtube.com/c/AmericanExperiencePBS), on the lie detector. A trailer for the episode is available here:
https://www.pbs.org/video/trailer-lie-detector/
The Lie Detector may be viewed live on PBS via the following link:
https://www.pbs.org/livestream/
In my opinion, the PBS American Experience episode "The Lie Detector" was excellent. It may now be viewed on demand through 31 January 2023 here:
https://www.pbs.org/video/the-lie-detector-sgcxef/
I watched it too. It was a good documentary but I wish it would have covered the polygraph usage in . . . let's say . . . the 21st century! The video just shows a history of the polygraph from its inception until maybe the 1990s but omits all of the relevant things that happened in modern day (all the spies and criminals who have passed it and the many stories on this antipolygraph.org site). The video doesn't even show the current computerized version of the polygraph. Hopefully they make a Part 2.