John Rogers was the creator of what TNT fantasy-adventure series?
John Rogers (writer):  He is best known as the creator of the television series "Leverage" (2008–2012), "The Librarians" (2014–present), and "The Player" (2015). The Librarians (2014 TV series): The Librarians is an American fantasy-adventure television series developed by John Rogers that is broadcast on TNT, and premiered on December 7, 2014.
The Librarians