Pete and Myka have to track down an elf haunting a businessman who has abandoned his family, while Claudia gives Artie a memorable Christmas gift and the rest of the team celebrates the holidays.

The team tries to track down their rogue member, and discover the artifact they have is unexpectedly powerful. Meanwhile, Claudia wonders about her future with the Warehouse team and Pete must choose between Kelly and the mission.

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.

The agents must use Helena's time machine to travel to 1961 to solve a case.

Artie's past as a traitor returns to haunt him when someone uses artifacts to murder, and his former Russian handler is the prime suspect.

Pete and Myka fall victim to an artifact that causes them to swap bodies, but the process will soon prove fatal if not reversed. Meanwhile, Artie and Claudia go after an artifact-enhanced seductress and Artie falls under her spell.

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.

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

Douglas Fargo, a member of Global Dynamics, travels from Eureka to Warehouse 13 to assist them with a computer system update. However, when a sentient computer virus is unleashed, the team is trapped when the warehouse goes into lockdown.

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

An artifact strikes close to home when the town near the Warehouse is plagued by an outbreak of B movie characters. Meanwhile, Mrs. Frederick and Valda undertake a risky procedure to discover what of MacPherson is still inside of Leena's mind.

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

After destroying the umbilicus, MacPherson rescues another prisoner from the Bronze Sector and travels to Europe for the next step in his plan. Pete and Myka identify the missing prisoner: H.G. Wells. Meanwhile, Mrs. Frederic determines the true traitor, and Claudia is briefly reunited with her brother.