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20 Episodes 2012 - 2013
Season 4 has Artie (Saul Rubinek) and Co. dealing with the destruction of the Warehouse, and trying to find a way to get everything back to the way it was. The extended season is split in two, with the first half focusing on the effects of Claudia's (Allison Scagliotti) actions regarding Steve (Aaron Ashmore), and Artie's relationship with Leena (Genelle Williams). There's also a pivotal guest appearance by Brent Spiner as Brother Adrian. The second half features a pair of "Buffy the Vampire Slayer" alums with major guest roles: James Marsters as Professor Sutton and Anthony Head as Paracelsus.
Episode 1
Mon, Jul 23, 2012 60 mins
Following the destruction of Warehouse 13, the team races halfway around the globe in search of a dangerous artifact in the Season 4 premiere.
Episode 2
Mon, Jul 30, 2012 60 mins
Pete and Myka investigate when angry mobs hallucinate en masse and attack innocent people.
Episode 3
Mon, Aug 6, 2012 60 mins
A small town is threatened by a box of artifacts.
Episode 4
Mon, Aug 13, 2012 60 mins
Hugo resurfaces to help track down an artifact at his nephew's prep school. Meanwhile, another artifact threatens the life of a musician in New Orleans.
Episode 5
Mon, Aug 20, 2012 60 mins
A hockey player's amazing recuperative ability prompts an investigation. Meanwhile, thefts from inside the warehouse are probed.
Episode 6
Mon, Aug 27, 2012 60 mins
The murderous spirit of Alice Liddell escapes after Lewis Carroll's mirror is stolen from the warehouse.
Episode 7
Mon, Sep 10, 2012 60 mins
Pete and Myka face a curious executive from a drug company as they deal with a pill that may increase people's height. Meanwhile, Artie, Steve and Claudia follow Brother Adrian to the place where he's hiding.
Episode 8
Mon, Sep 17, 2012 60 mins
Pete and Myka uncover people who are rusting away in West Virginia. Meanwhile, Steve tries to quit his dependence on the Metronome by visiting his hometown; and Artie reveals the truth about Brother Adrian to Mrs. Frederic and H.G. Wells.
Episode 9
Mon, Sep 24, 2012 60 mins
Brother Adrian resorts to extreme measures, sending deadly artifacts to the agents' loved ones, to coerce Artie into reversing the Astrolabe's effects. Meanwhile, Mrs. Frederic and Steve uncover something shocking during a trip to the Vatican.
Episode 10
Mon, Oct 1, 2012 60 mins
The team find themselves battling one of their own when Artie's obsession with the Astrolabe reaches dangerous proportions.
Episode 11
Mon, Apr 29, 2013 60 mins
The entire planet is in danger from the sweating sickness released by Artie, who lies close to death after being stabbed by Claudia. To find a cure and save the world, Pete and Myka must rely on a seemingly unreliable professor. At the same time, Claudia and Steve risk their lives to help Artie.
Episode 12
Mon, May 6, 2013 60 mins
Artie has a few hurdles to overcome before he can get back to work; Pete and Claudia team up on a murder investigation involving a radical environmental group.
Episode 13
Mon, May 13, 2013 60 mins
A mostly black-and-white episode pays tribute to film noir as Pete and Myka find themselves transported into an unfinished 1940s crime thriller. Meanwhile, Artie, Claudia and Steve chase down a phantom car thief.
Episode 14
Mon, May 20, 2013 60 mins
Pete and Myka head to Las Vegas to solve a series of murders surrounding the world of magic; Claudia and Jinks search for an artifact used to rig horse races; Artie is thrown for a loop by the new bed-and-breakfast manager.
Episode 15
Mon, Jun 3, 2013 60 mins
H.G. Wells returns to help Pete and Myka track down an artifact that forces confessions out of criminals.
Episode 16
Mon, Jun 10, 2013 60 mins
Pete, Myka and Steve team up with a U.S. Marshal to recapture two inmates who escaped from a prison in Arkansas during a volcanic event.
Episode 17
Mon, Jun 17, 2013 60 mins
Myka and Pete investigate the effect of a mysterious artifact on the residents of a posh gated community.
Episode 18
Mon, Jun 24, 2013 60 mins
The team set out to recover artifacts stolen from Warehouse 12 by an infamous pirate.
Episode 19
Mon, Jul 1, 2013 60 mins
The clock is ticking to track down an evil alchemist who has bronzed Claudia and stolen the only artifact that can reverse the condition, which seems to be affecting Mrs. Frederic and the Warehouse, too.
Episode 20
Mon, Jul 8, 2013 60 mins
The team must capture Paracelsus before he achieves immortality, or worse. At the same time, Myka seems to be losing her battle against cancer; and Steve learns that Artie has been keeping life-changing information under wraps.