|... And the Trial of the One|
|Directed by||Marc Roskin|
|Written by||Tom MacRae|
|Original airdate||January 31, 2018|
|Previous Episode||"... And Some Dude Named Jeff"|
|Next Episode||"... And the Echoes of Memory"|
It’s time to choose the singular Librarian to tether with Baird, but no one can decide so the Library takes it upon itself to help. Reducing the Librarians to their most primal selves and abandoning them in a landscape of their own nightmares, it’s The Trial of the One – but can they regain their humanity in time to stop the bloodshed and prevent the death of two Librarians AND Jenkins?
Loud bells begin to chime in the Library which indicates that the tethering needs to happen right away. Jenkins is able to get the bells to stop ringing for now but he tells them that the Library is beginning to untether from reality and the only way to stop it is to perform the tethering ceremony as soon as possible. The Librarians struggle to decide who will be the one to tether themselves since they do not take the decision to become immortal lightly.
Cassandra finds a spell, The Ritual of the One, and asks Stone to read it in the hopes that it will be able to decide which one of them is the best and in turn be the one to be tethered to the Library. They initially believe it didn't work but all of them are eventually brought to the Trial grounds, where the Library decrees a battle to the death that will leave only one Librarian alive. The Library has taken Jenkins captive and his life will be forfeited if the Librarians refuse to participate.
Cassandra, Stone, and Ezekiel are each transported to their worst nightmares. While in there, they encounter versions of their friends recast as enemies. They are pushed to forget one another and then emerge without memories of one another. Each Librarians is convinced that the only way to save Jenkins is to kill the others in order to be the first to hit a gold button. A violent battle ensues between the three of them until Eve intervenes and talks them down, convincing them not to murder one another.
Jenkins is freed but the Library still kills him. The Librarians are all outraged by this move so they all resign. With the Librarianship now vacant, Eve is devastated. Nicole Noone visits Eve and tells her that this was all part of her plan. Now that the Library has been abandoned by the Librarians and remains untethered, it fades out of reality and Eve is left alone in a washed-out alternate world.
- Rebecca Romijn as Eve Baird
- Christian Kane as Jacob Stone
- Lindy Booth as Cassandra Cillian
- John Kim as Ezekiel Jones
- John Larroquette as Jenkins