Fair rating?The Librarians· Season 4 · Episode 1
And the Dark Secret
When a secret sect of the Vatican Church unearths an ancient map detailing the locations of the four cornerstones of the Library of Alexandria (the original Library), it's up to Flynn and the Librarians – with the help of an unexpected ally – to stop them before the stones can be used to destroy the Library.
Streaming on (US) ![]()
![]()
See all
#8In Season 4of 12 rated episodes
#28All-timeof 42 rated episodes
−0.1vs season avgSeason 4 averages 6.5
2017First airedDecember 13, 2017
Guest stars
Noah Wyleas Flynn Carsen
Rachel Nicholsas Nicole Noone
John Nobleas Monsignor Vega
German Alexanderas Father GialloCatherine Grace Olsonas Opera Singer #1
Antonia Tameras Opera Singer #2
Lex Damisas Priest #2Nathan Crosbyas Park Ranger
Tommy Danielsas Priest #1Ciro Fuscoas Old Italian Worker
Tim Harroldas Cop
Barbie Wuas PhotographerCrew
Marc RoskinDirector
Marco SchnabelWriter
Marco SchnabelWriter