On this episode of Supernatural…

Sam and Dean find the Men of Letters secret hideaway filled with every scroll, secret, spell, and supernatural information that they collected.

Sam uses the library to discover a case involving Nazi Necromancers of the Thule versus the Judah initiative.

They discover a young Jewish man named Aaron in control of a golem, but unable to guide him.

The Necromancers try and steal special supernatural secrets, but Sam and Dean manage to stop them despite the golem being decommissioned.

Aaron takes control of the golem and becomes a part of the Judah initiative.

Sam and Dean settle into the Men of Letter's home base ready for the next challenge.