Jonathan Frakes, who directed ten episodes and two of the three The Librarian movies that proceeded this series, also directed 13 episodes of the television show Leverage, where Christian Kane started as The Hitter, Eliot Spencer.
Jake Stone is an expert Art Historian. Christian Kane majored in Art History in college.
King Elendils helmet from The Lord of the Rings: The Fellowship of the Ring (2001) appears on a stand in the main room of The Library.
That show's ratings were down in its fourth year, but the news of its cancellation in March 2018 still came as somewhat of a surprise. The Librarians has a very dedicated fanbase that keeps the show trending on Twitter, and its ratings were still okay for a cable series. But network TNT was going through a period of rebranding, and apparently they decided the veteran show did not fit in as well with their new look (a situation which also led to The Last Ship being with its fifth, and ultimately final, season). Producer Dean Devlin indicated that he would be shopping the show to other venues, and called for fans to support it on the social networks. His efforts were unsuccessful and the series has remained out of production with any of its props auctioned off.