The Librarians are heading to jail.

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Filming is under way for the second season of the TNT series, and Noah Wyle's LITs no longer have their training wheels. That doesn't mean the team won't stick together, however (honestly, they'd be lost without each other.)

To kick off season 2, Eve (Rebecca Romijn), Jake (Christian Kane), Cassandra (Lindy Booth) and Ezekiel (John Kim) will use their combined genius to track down a dangerous artifact within the confined walls of a penitentiary.

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"Every time I film in a prison, I wonder if a guy like me actually gets to go home at the end of the day:)," Kane recently teased while Booth lamented the lack of cell phone reception behind bars.

Flynn Carsen (Noah Wyle), the original Librarian, will appear in the premiere. Drew Powell will guest (see photos below).

On set, the cast appears to be having plenty of fun...and naps. Scroll through the photos below to get a look at the premiere and see what Carsen's team will be up against when they head to the big house.

Find out more when The Librarians returns to TNT for a 10-episode season later this year.

Tags: The Librarians television TNT