While the team deals with the news that Warehouse 13 is moving, Mrs. Frederic has them load their greatest memories of their missions into an artifact for future generations.

As Sykes begins his end game, the agents discover that Helena is still alive... and teaching high school literature. Meanwhile, Jane reveals the full extent of her plan but one agent will lose their life carrying it out.

Pete and Myka race to stop Sykes from using his own cache of artifacts to destroy them and the Warehouse.

Pete, Myka, and Claudia set off to rescue their loved ones when Brother Adrian sends them deadly artifacts. Meanwhile, Mrs. Frederic and Steve travel to Rome and learn Adrian's dark secret.

The team have no time to mourn a fallen comrade as they go after the person responsible, the nemesis that has been stalking Artie since he used Magellan's Astrolabe to save the world.

Pete and Myka capture Paracelsus but not before he makes himself immortal. When Myka's cancer becomes worse, Pete must make a deal with Paracelsus to cure his partner. Meanwhile, Claudia receives some startling news from Artie.

Pete Lattimer is hit in the head by an artifact and wakes up to a life where he was never born. Pete must hunt down and persuade the Warehouse team (none of whom recognize him) to go on this life or death mission with him to vanquish a long dead nemesis from the past to get everyone’s lives back.

In the aftermath of the warehouse's destruction, the Warehouse team races against the clock to find a way to undo time itself and put right what went wrong. However, Artie finds himself facing a difficult decision when he is warned that saving the warehouse will unleash an even greater evil.

In the season two premiere, we pick up right where we left off. MacPherson has blown Artie to smithereens, and disappeared. Is Leena really a traitor? Where has Claudia gone? How will Pete, Myka and the Warehouse fare without Artie? What other havoc did MacPherson wreak when he was alone in the Warehouse? And is there yet a new villain on the horizon?

Sally Stukowski and her partner make their move, attacking the Regents and using an artifact to trap them in a building and bring it down around them.

With the fate of the world in their hands, Pete and Myka's only hope of finding a cure to the Sweating Sickness is a drunken history professor. Meanwhile, Steven and Claudia enter Artie's subconscious in an attempt to bring him out of his coma before he fades away for good.

The agents track down a cache of artifacts stolen from Warehouse 12 by the infamous Roaring Dan Seavey... and guarded by his ghost. Meanwhile, Charlotte Dupres makes her move with the help of her inside person.

Pete, Myka, and Charlotte must track down Sutton, the only man who knows where they can find Paracelsus and exchange the Philosopher's Stone for the stele that will free Claudia from her bronze imprisonment... before she disintegrates.

Pete and Myka are sent to investigate a town where the inhabitants' minds are being altered making them act as they please. Meanwhile, Artie is confused by the energy flows going on in the warehouse.

A woman kidnaps Artie and insists that he help her recover her brother... who was lost in an artifact-related experiment 12 years ago.

When we last left agents Myka Bering and Pete Lattimer at the conclusion of season 2, Myka had decided to leave the top secret team with little to no warning. As season 3 begins, Artie fills Myka's shoes with 'The New Guy,' which also happens to be the name of the season premiere episode.

The Brotherhood continues its assault on Artie's life, targeting someone close to him with Alice Liddell, the imprisoned spirit within the Dodgson Mirror. Meanwhile, Claudia learns of the connection between her and Steven.

While Pete and Myka investigate a series of artifact-related growth spurts, Artie reluctantly takes Steve and Claudia with him to track down Brother Adrian before he can steal more artifacts from the warehouse.

A mishap with an artifact traps Pete and Myka in a fictional 1940s world where they have to solve a murder to escape... but someone doesn't want them to. Meanwhile, Claudia and Steven convince Artie to go along with them to investigate reports of stolen cars, and Artie starts taking dangerous risks.

Pete's former girlfriend Kelly Hernandez asks him to help her find her missing grandmother, and the trail leads into a cancelled telenovela. Meanwhile, Artie forces Claudia to go with Steve to investigate the case of a college student of whose spine broke in the middle of a classroom presentation.

Pete and Myka are after a team of bank robbers who have a distinctive weapon. Meanwhile, Artie examines the security breach at the warehouse.

Pete and Myka return to Washington to intercept a samurai sword that is to be presented to the president, and they discover a competitor for items that belong to the warehouse.

Pete and Myka go to Las Vegas to fetch an artifact that is helping a couple of gamblers, but the mission goes awry when Myka becomes trapped in a famous author's mirror.

After receiving word that her father is dying, Myka travels home to see her parents.

When Mrs. Frederic is stricken ill, the agents must search for a cure before it's too late. Their quest takes them to Egypt and the long-lost Warehouse 2.