I enjoy this show a lot. I had started watching it with my (since deceased) grandmother, I guess as an outgrowth of watching Antiques Roadshow with her.
People approach the detectives with items or stories they'd like more information about, and we follow their investigations. They return to share their findings with the person. They tend to be very interesting. While the items or stories usually have personal significance for the people who had them, they tend to be of general interest as well, covering sometimes little-known aspects of history, or even being findings of some importance.
It's definitely good family viewing, but I continue to watch it on my own.
