Episode 1 : The New Guy
Warehouse 13's newest agent, Steve Jinks, is on his first assignment accompanying Pete to solve mysterious deaths related to a secret banking conference in Denver.
Episode 2 : Trials
Myka struggles with her decision to return to Warehouse 13, but is immediately thrust onto a new case: witnesses to a murder trial in Seattle are suddenly falling victim to an inexplicable diagnosis of accelerated dementia.
Episode 3 : Love Sick
Artie's not-so-secret crush, Dr. Vanessa Calder, has called him to a case where female victims are disintegrating into clay. A diagnosis of their DNA reveals a cyber matrix rather than human sequence, so computer whiz Hugo Miller joins the investigation - Artie is less than pleased to learn he's Vanessa's ex-flame. A search for a cyber peeping Tom connected to all the victims, threatens to go viral when he takes over the electronic store's television screens. If the agents don't find the suspect and artifact soon, everyone in the store will turn into clay, including Hugo, the only one who can re-write the anti-virus code. Meanwhile, Pete and Myka find themselves in bed together with no recollection of what happened. They awkwardly must retrace their steps to find clues in the Warehouse, but what they find is a bronzed Steve - what kind of trouble did the two get into?
Episode 4 : Queen for a Day
To everyone's surprise, Pete gets an unexpected visit from his ex-wife Amanda who is in town to remarry a new love. But when an artifact belonging to a female Pharaoh accidently follows her on the wedding day, the bridezilla turns into the Queen Bee.
Episode 5 : 3...2...1...
Three unsolved cases from different eras are suspected to be connected to Joshua's Trumpet -- originally found by H.G. Wells during Warehouse 2. The ancient ram's horn connected to a rocket was invented to pulverize anything in its path,.
Episode 6 : Don't Hate the Player
The Warehouse receives a frantic call that sends Pete, Claudia and Myka to rescue two video game developers, one who is a familiar face to Warehouse 13, Fargo. The computer geeks are stuck between fantasy and reality, caused by sipping from an old set of Beatrice Potter's teacups, and their heart rates are dangerously accelerating. It's up to the agents to go into the game world, only to discover it's been modeled after the Warehouse! The agents must maneuver through the levels, search for the trapped gamers and face their fears before they all die in the game and consequently in real life too. Meanwhile Artie and Steve's services have been requested by Stukowski to investigate a death in an art gallery. Realizing that an artifact -- Van Gogh's painting "Stormy Night" -- is responsible for the death, the agents attempt to steal it only to be interrupted by Stukowski!
Episode 7 : Past Imperfect
On a routine assignment, Myka spots Leo, the man responsible for the death of her CIA partner, Sam, but loses sight of him in the busy train station. Myka is flooded by painful memories of her love affair with Sam, but must keep focus to track down the suspect with the help of her old team. When Leo escapes, yet again, Pete and Myka are convinced he has an artifact that allows him to freeze time in order to flee. The only clue is a blank card left behind by Sam for Myka, but can she solve his hidden message before she loses another partner? Pete is in the direct path of a frozen bullet, and it's up to Myka to stop the clock before the bullet resumes its speed. Meanwhile, back at the Warehouse, Artie has a new companion, with four legs.
Episode 8 : The 40th Floor
The Warehouse agents have Stukowski under interrogation after finding out she's been stealing artifacts and using them to kill regents -- the secret protectors of the Warehouse. Three more regents are in danger when the building they are secretly meeting in has been enveloped by a corrosive energy and about to collapse. With no way out, Artie and Myka scramble to get the regents to safety, while Pete and Claudia hunt for Stukowski's partner in crime, who is in possession of a spray can used on the crumbled Berlin Wall. Mrs. Frederic employs questionable tactics to get Stukowski to talk, provoking Steve to pull a gun on his own boss.
Episode 9 : Shadows
The secret is out: Jane is a Regent. Unsure of how to handle this, Pete travels with Jane into her memory. While Jane's reasons are business -- the connection between A-to-Z Technologies and the recent Regent murders -- Pete's reasons are personal. Myka and Claudia are called to duty when a local t-shirt shop owner, Jason Kinser, vanishes. After another disappearance, a visit to Kinser's t-shirt shop and a chat with his employees, Dan, Jeff and Viola, Myka and Claudia make the connection: anytime Megan Reese, a former Kinser employee, becomes upset, the instigator disappears. With another disappearance, Myka and Claudia realize it is not Megan causing this; someone is following her. That someone? Jeff from the t-shirt shop. A confrontation between Megan and Jeff ends in a chase as Myka and Claudia successfully retrieve a pair of binoculars, Jeff's weapon of choice. In Jane's memory, Pete and Jane travel to Pete's father's wake. Pete discovers his father insisted she return to the Warehouse. Next, they see Artie and MacPherson strip a braided bracelet from a young baseball superstar, Walter Sykes. That is the connection! Sykes owns A-to-Z-Technologies, named after his team the Aztecs. As a result of losing the Collodi Bracelet, Sykes is bound to a wheelchair and set on destroying the Regents.
Episode 10 : Insatiable
After an attack in the woods outside Ithaca, NY, Pete and Myka travel to the scene to find a man in his 30s shivering, with cold breath and gnawing on a deer. As the teeth marks in the victim resembled that of humans, Pete's mind wanders to zombies. Myka, unconvinced, treats Pete to a burrito at Manny's Taco Truck. As they visit the most recent attack site, Pete is bitten and becomes the newest victim. Much to their surprise, Myka, not Pete, begins to develop symptoms similar to the victims. The connection: a 19th-century mason jar in Manny's Taco Truck. Pete destroys the tip jar on-site. Since agent Steve Jinks left the Warehouse, he has been cold to Claudia, his supposed best friend. As she calls him, excited she will be jamming with the band Dead Rent, Steve claims their friendship is over. To worsen the mood, a fortune telling machine tells Claudia her life will end by midnight. Luckily, Leena shows Claudia the machine is fixed and there is nothing to worry about. As Steve sits alone and depressed in a bar, with a rejected credit card and no way of paying for his drinks, he is approached by Marcus Diamond. Marcus proposes Steve joins his "team" -- where he will be fully appreciated. Steve, weak in his sadness, accepts.
Episode 11 : Emily Lake
Pete and Myka race to stop Sykes from using his own cache of artifacts to destroy them and the Warehouse in the Season Finale! Part 1 of 2.
Episode 12 : Stand
Pete and Myka race to stop Sykes from using his own cahe of artifacts to destroy them and the Warehouse in the Season Finale! Part 2 of 2.
Episode 13 : The Greatest Gift
In Warehouse 13's "The Greatest Gift," Pete Lattimer (Eddie McClintock) 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. This episode takes a page from It's a Wonderful Life and The Greatest Gift, which is the short story on which the iconic movie was based. As he did last year, showrunner Jack Kenny directed the holiday episode.