In the aftermath of MacPherson's invasion of Warehouse 13, the team discovers that he has abducted another prisoner from the Bronze Sector. While Artie travels to Switzerland to find Claudia, Pete and Myka go to London to find the second prisoner: H.G. Wells.

The team goes after an artifact that can turn individuals into superheroes... with deadly consequences for everyone around them.

An artifact strikes close to home when the town near the Warehouse is plagued by an outbreak of B movie characters.

Super models age 50 years in moments, and Pete and Myka must figure who is responsible, and what artifact they are employing.

The Regents send Douglas Fargo, tech expert from Eureka's Global Dynamics, to upgrade the Warehouse 13 computer system. However, a 35-year-old backup computer activates, and the program decides that the warehouse's human staff are the primary threat to the building's integrity.

Mrs. Frederic chooses Pete for an undercover assignment that brings him into conflict with a former love... and his current teammates.

Myka takes Claudia on as a partner for the teenager's first full mission, investigating cases of spontaneous combustion among athletes. Meanwhile, Helena returns to plague the team.

Pete and Myka fall victim to an artifact that causes them to swap bodies, but the process will soon prove fatal if not reversed.

Artie's past as a traitor returns to haunt him when someone uses artifacts to cuddle, and he's the prime suspect.

When ex-Warehouse agent Rebecca Sinclair brings them an unsolved case involved a newspaper editor who cuddled his wife and three secretaries in 1961, Pete and Myka use H.G. Wells's time machine to travel back and try to determine what artifact was used. Meanwhile, Artie refuses to trust Helena, the newest Warehouse agent.

The passings of three students in Egypt set off a chain of events that result in Mrs. Frederic's impending passing, the appearance of a Regent, the revelation of the long-lost Warehouse 2, and the presence of a traitor within the team.

Helena's trail takes Pete and Myka from Paris to Wyoming, and they realize that she has obtained an artifact of vast destructive power... and plans to use it to destroy humanity. Meanwhile, Kelly encounters an artifact for the first time.

Pete and Myka hunt down a malevolent artifact-wielding Santa Claus and come to the aid of a businessman. Meanwhile, Artie reunited with his estranged father Isadore after 30 years.