Pete and Myka visit a Florida prison to probe a spate of unexplained suicides. Meanwhile, Claudia changes a light bulb with the help of an artifact.

Pete, Myka, and Steven team up with a U.S. Marshal to track down two prisoners who used a lava-spewing artifact to escape prison. However, they discover that the Marshal is Steve's ex. Meanwhile, Artie and Claudia try to track down part of an artifact that is rendering Artie deaf...

While Pete and Steven check out a life-threatening incident at a renaissance faire, Myka agrees to help Claudia revive her comatose sister. However, they discover that doing so has unexpected consequences that threaten the warehouse and everyone in it.

The team discovers that MacPherson is auctioning artifacts he has siphoned from the Warehouse shelves.

While Pete and Claudia travel to Oregon to look for an artifact used to kill enemies of the environmental movement, Artie deals with the repercussions of Leena's death.

While Pete and Myka travel to Las Vegas to investigate two deaths where the people inexplicably fell from great heights, Claudia and Steven investigate two jockeys in London who went into comas after winning their races. Meanwhile, Artie gets a visitor to the warehouse.

A super-powered vigilante is at large in Detroit, and the agents try to track down the person responsible. Meanwhile, things between Leena and Claudia are still tense, and Artie is haunted by the spirit of his dead friend.

As the Warehouse team prepares to celebrate the holidays in snowy South Dakota, Pete and Myka are called upon to hunt down a malevolent Santa Claus. Meanwhile, in time for Hanukkah, Artie and his estranged father, Isadore Weisfelt reunite after 30 years.

Pete's ex-wife arrives in town to remarry, but an artifact may derail the wedding. Steve and Claudia visit a Civil War reenactment in search of an artifact

Myka and Pete deal with a plague of zombies in Ithaca, while Claudia deals with a new romance, a prophecy of death, and a rejection from a friend.

While Claudia tries to help a friend and gets unexpected help, Pete and Myka investigate an artifact that causes crowds to see certain individuals as monsters... and attack them.

Someone in a gated community is using an artifact to extract vengeance and Myka and Pete go to investigate. Meanwhile, Artie and Claudia help a teen suffering from dangerous visions, and Steven and Abigail clean up the warehouse.

While Pete and Myka team up with two former Secret Service co-workers to investigate a series of bizarre deaths in Washington DC, Artie agrees to show Claudia how and why her sister had to disappear.

Secret Service agents Lattimer and Bering are "rewarded" with a transfer to the top-secret Warehouse 13. They meet Artie Nielsen, the caretaker of the mysterious warehouse, who tells them about their new job. The agents are responsible for the collection of every supernatural and unexplained item that the U.S. Government has ever collected. For their first assignment, they are sent to Iowa to investigate a possible artifact belonging to a college student who went berserk and assaulted his girlfriend while chanting an Italian incantation.

When an artifact meant for the Warehouse turns up in the small town next door, the team finds themselves in the middle of a B-movie meltdown complete with cowboys, gladiators, sci-fi robots and beach storming marines. Their only chance of survival rests with the man who invented television, Philo T. Farnsworth.

Mrs. Frederick secretly recruits Pete to find a mole within the organization who is buying artifacts. However, when the mole finds out, they go after those closest to Pete.

Claudia has just been given her first assignment, but when it involves a real human torch and H.G. Wells could it be too much for her to handle? Not to mention an appearance by an old love of Artie's

While Pete and Myka go after someone using an artifact to induce Alzheimer's, Claudia goes on her first case as a full agent with Steve to track down Typhoid Mary's knife.

Pete, Claudia, and Myka are called in to help Fargo, who is trapped in a virtual reality swords & sorcery game. Meanwhile, Artie and Steve are summoned to New York to recover an artifact... by FBI agent Sally Stukowski.

While in Denver, Myka picks up the trail of the counterfeiter who killed her former partner, Sam Martino. Meanwhile, Artie, Claudia, and Steve interrogate a dog that witnessed the theft of an artifact.

While Pete and his mother Jane try to determine the origins of their mysterious opponents, Myka and Claudia travel to Portland to stop a girl who can apparently vaporize anyone she hates with blasts of radiation.

A cache of Walter Skyes' stolen artifacts turn up and all six agents go into the field to recover them. Artie unexpectedly reveals his secret to Leena, while Steve begins to realize the downside of the metronome that brought him back to life.

While Pete and Claudia help Hugo Miller track down a bag of marbles at a boy's academy, Myka and Steve travel to New Orleans on the trail of another artifact while Artie meets with Brother Adrian.

While Pete and Myka travel to West Virginia to investigate a rust-like infection among steelworkers, Steven and Claudia go to Steven's home to find a way to break the metronome's hold on him. Meanwhile, Helena, Leena, and Mrs. Frederic confront Artie with their knowledge of what he has done.

Pete and Myka take on a previous agent's assignment after the man's corpse turns up in the basement of a St. Louis police station.