The team continues their attempt to capture Paracelsus before he achieves immortality. Myka seems to be losing her battle with cancer. Steve learns that Artie has been hiding life-changing information from the rest of the team.

The agents capture Paracelsus, but soon discover that's exactly what he wants. Meanwhile, Myka goes in for surgery and Artie tells Claudia a family secret.

After bronzing Claudia, Paracelsus escapes with the only artefact that can reverse the process, and the team has to hunt him down before it's too late. Meanwhile, Claudia's link to Warehouse 13 endangers the building and Mrs. Frederic.

The Warehouse agents have to work against the clock to de-bronze a disintegrating Claudia and hunt down Paracelsus, Nick, and Sutton.

Claudia and Steve get an intruder alert, which leads them to the shocking reveal that Paracelsus is alive and in the Warehouse. Meanwhile, Artie takes Pete and Myka to Buffalo to hunt down artefacts stolen from Warehouse 12 by Roaring Dan Seavey and his pirates centuries ago. There they find and team up with the duplicitous Charlotte Dupres whose agenda puts all their lives in danger.

Pete and Myka investigate when a series of mysterious incidents occur at an expensive gated community, and soon discover that someone is using an artefact to get revenge. Meanwhile, Claudia and Artie must help a homeless boy experiencing recurring moments of mathematical brilliance, each of which is followed by a seizure of increasing intensity.

Pete, Myka and Jinks deal with a prison break where the wall appears to have been melted by molten lava, and the Marshall assigned is Steve's ex-boyfriend. Meanwhile, Artie is struck deaf and Claudia must help him locate a missing statuette from Beethoven's clock before it becomes permanent.

H.G. Wells re-enters the picture when she calls on Pete and Myka to help find an artefact that's forcing confessions out of criminals. Meanwhile, the rest of the team deals with earthquakes INSIDE the Warehouse.

Pete and Myka head to Vegas to investigate deaths that are tied to the world of high magic. Meanwhile, Claudia and Jinks go to Watford, England, to search for an artefact used to rig horse races, while Mrs. Fredericks introduces Artie to the new owner of the B&B, Abigail Cho, a former psychotherapist who helps address his grief over Leena.

An artefact sucks Pete and Myka into a 1940s detective novel, but their lives are in real danger. Meanwhile, Artie, Steve, and Claudia go after a phantom car thief with racing gloves that enable a car to pass through solid matter.

While Artie tries to get back to work, Pete and Claudia investigate a radical activist from an environmental group that may be tied to an artefact... and who is killing off each member of the group that disbanded 30 years ago.

Pete and Claudia investigate a series of accidents involving earthquakes, sinkholes, and landslides, while Myka and Steve try to help Artie adjust to a Warehouse without Leena.

After Artie uses the Chinese Orchid to release the Sweating Sickness, Pete and Myka are left with 24 hours to save the entire world, while Steve and Claudia try to save Artie from his subconscious.

After discovering the truth about their situation, the agents gather at the Warehouse and set out to find the person responsible for the Warehouse thefts and the attacks on their loved ones... before the responsible party endangers the world.

Unable to find where H.G. Wells hid the astrolabe, a criminally insane Artie threatens to unleash a plague upon the entire world if it is not given back to him. The Warehouse agents race against time to stop him.

Artie and Leena stay in the Warehouse to find Brother Adrian, who ramps up his campaign against Artie by targeting the team's loved ones (Pete's ex-wife, Myka's sister, and Claudia's brother). Pete, Myka and Claudia try to save them, while elsewhere Steve and Mrs. Frederic discover the reason behind the Brotherhood's attacks.

Pete and Myka trace two cases of a strange rusting disease to a factory run by a shady character named Siskel, and uncover links to an explosion at a museum. Meanwhile, Steve and Claudia try to get Steve off the metronome, while Artie deals with Helena, Leena, and Mrs. Frederic about the astrolabe and Brother Adrian.

Artie, Steve and Claudia try to find out where Brother Adrian is hiding. Meanwhile, Pete and Myka search for an artefact that is making people taller with deadly consequences, while a nosy drug executive is tailing them and is putting the secrets of the Warehouse itself at risk.

A previously snagged artefact, Lewis Carroll's Mirror, turns up in a case and Alice is released into the world once more, but, this time, she is hunting something very specific, and will stop at nothing to carry out her goal.

Artie and Steve investigate the theft of artefacts from the Warehouse while Mrs Frederic invites Claudia to lunch, and Pete and Myka look into a series of incidents involving a miraculously healed athlete.

Pete and Claudia hunt down an artefact at a prep school Hugo Miller's nephew attends, while Myka and Steve investigate an artefact in New Orleans. Artie has to deal with Brother Adrian's continuing investigations into Magellan's astrolabe.

It's all hands on deck to prevent a small town from being wiped off the map when a box full of artefacts is accidentally unleashed there.

Pete and Myka travel to Philadelphia to investigate an artifact that is causing people to see bizarre monsters while Artie attempts to stop Claudia from resurrecting Steve.

With the destruction of Warehouse 13 and the death of three of their friends, the only hope left for Myka, Pete, Claudia, and Artie is to recover an obscure artifact which may not even exist... and which could have deadly consequences when they use it for personal gain.