The Librarians production crew was set up downtown Portland on Broadway and Oak streets and around the block of the Benson Hotel. They had several trucks, trailers and lots of filming equipment. It was a base camp for while they filmed in the basement of The Benson Hotel. I was able to walk around to see some of the set up and got a peek down the steps to the filming area in the basement.
There were a lot of extras on the set and looked like the full crew and actors. They had been filming for a couple of days and were finishing today. I was able to do a few photos of the location but did not have access to the filming. They were shooting cool air into the basement. It did look a bit hazy when I was able to see down the steps.