The Librarians
Watch The Librarians's premiere 'And the Crown of King Arthur' and 'And the Sword in the Stone' onlineElectric Entertainment/ TNT

The Librarians, TNT's new adventure series based on the network's popular Librarian movie trilogy, premieres tonight (7 December).

The official synopsis of the series reads:

"Returning to the universe of TNT's hit movie franchise, The Librarian, this new series centers on an ancient organization hidden beneath the Metropolitan Public Library dedicated to protecting an unknowing world from the secret, magical reality hidden all around. This group solves impossible mysteries, fights supernatural threats and recovers powerful artifacts, including the Ark of the Covenant, the Spear of Destiny, and Excalibur."

The new series serves as a continuation of the movies, with actor Noah Wyle reprising his role as Flynn Carsen, the titular Librarian responsible for finding and protecting objects of mythical importance, reports Variety.

"I was really nervous to do it," Wyle says of stepping back into the role nearly seven years after the final movie. "Then, I put on this costume, and the first scene we shot was the first scene that Flynn appears in the show — which is when he falls out of a wall — and as soon as I did that pratfall and jumped up, it was like, 'Oh, I love this guy! I missed this guy!'"

Here's how the plot will kick off in the premiere episodes (via Variety):

When The Librarians premieres on Sunday night, viewers will find Flynn in the middle of a crisis when the villainous Serpent Brotherhood starts killing Librarian candidates, and forces Judson and Charlene (Bob Newhart and Jane Curtin, reprising their movie roles) to take drastic measures to save the Library.

He is forced to accept the help of his new guardian, Col. Eve Baird (Rebecca Romijn), a NATO counter-terrorism expert, to find the Librarians-to-be and protect them from impending danger.

The two-hour series premiere of The Librarians debuts Sunday, 7 December at 8pm ET/PT on TNT.

Click here or here to watch the premiere episodes live stream online.