Eventually she came to realize that Joshua was, in fact, alive and trying to contact her from the immaterial prison of the inter-dimensional limbo that resulted from his experiment.
Blaming Artie for what happened to Joshua, Claudia first hacked the American power grid in order to identify pockets of large, unexplained, energy usage.
Shortly after, in the main timeline of "Claudia", she arrives at the Warehouse and abducts Artie, taking him to the site of her brother's failed experiment.
They successfully enter the inter-dimensional space where Joshua is trapped, completing the instruction engraved on Rheticus' compass in order to bring them all back to the corporeal realm.
Given Claudia's technological aptitude and ingenuity, and some convincing from Leena, Artie opts to offer her a job at the Warehouse, which she readily accepts.
[4] Most of her initial work involves record-keeping, filing, and taking inventory, which she finds to be a mind-numbingly tedious waste of her skills.
Bored with her assigned tasks, she takes up personal side projects, including repurposing a spectroscope into a 3D hologram imager.
Frightened, Claudia reveals to Artie that she's not ready to be caretaker and makes him promise to never put her in that position, to have something done to her against her will, again.
It is revealed in season 3's "Don't Hate the Player" that Claudia's experience in the psychiatric hospital has left her with the fear that her life is not real, but a creation of her imagination and she is still locked in the institution being given electroshock therapy.
In the Season 4 episode "No Pain, No Gain", Mrs. Frederic tutors Claudia about the warehouse and its artifacts — how they are created and that not all of them may be dangerous.
Claudia eventually overcomes her trepidation and realizes that she wants badly to become caretaker of Warehouse 13, which she reveals to Abigail Chow in the episode "Instinct".
As the show ends, Claudia is seen at King Arthur's roundtable viewing memories of her former fellow agents, and friends.
Some of the gadgets Pete and Myka use in the field are "Claudia Donovan Originals": she creates handcuffs capable of delivering a 20,000 volt charge ("Claudia"); gloves which discharge energy absorbed by an artifact suit ("Mild Mannered"); and a communicator to interact with people in a virtual reality console ("Don't Hate the Player").
During the time that Myka leaves the Warehouse, Claudia apparently steps up to full-time agent status alongside Pete and Artie.
As seen in "Age Before Beauty", Artie's uneasiness with the role of father figure often leads to awkward conversations when he feels the need to give advice.
In season 2, Claudia develops a romantic relationship with Todd, a recent arrival in Univille and an employee at the hardware store.