I think that the old network show "Homicide: Life on the Streets" had an episode that depicted the story from the Keepers. I know that Homicide has been off the air for at least 2 decades, but that was a great show.
I'd also recommend the show called "The Detectorists", a BBC show which prime currently has. It's not a documentary, very British and dry, but enjoyable. Only 7 or 8 half hour episodes per season, but worth the watch.