Original air date: 07/23/2012 Runtime: 42:36 min. We find our Team still reeling from the shocking events of our climatic Season 3 ender - the loss of Agent Steve Jinx and the destruction of the Warehouse itself. Their only hope lies in racing to the other side of the Earth in a frantic race to hunt down an obscure and dangerous artifact which may or may or may not even exist and, even if it does exist, will using it help at all?
Original air date: 08/13/2012 Runtime: 43:06 min. Pete and Claudia reunite with Warehouse alum Hugo (Rene Auberjonois) to track down a deadly artifact at his nephew's prep school, while Myka and Steve investigate an Artifact that is killing an up and coming musician (Sam Huntington) in New Orleans.
Original air date: 08/20/2012 Runtime: 43:03 min. Pete and Myka investigate a hockey player who seems to be miraculously and instantly recovering from serious game injuries, while Claudia is invited to a mysterious lunch by Mrs. Frederic. Elsewhere, Artie and Steve discover someone has been stealing artifacts from inside the Warehouse. Guest stars BSG actor Mike Dopud as Hockey Player "Mike Madden."
Original air date: 08/27/2012 Runtime: 43:05 min. Someone has stolen Lewis Carroll’s Mirror from inside the Warehouse allowing the psychotic and murderous spirit of Alice Liddell to escape again. Our team must stop her killing spree before one of them ends up dead. Guest stars Lindsay Wagner as recurring character "Dr. Vanessa Calder."
Original air date: 09/10/2012 Runtime: 42:51 min. Pete and Myka cross paths with an inquisitive drug company exec when it looks like a pill is making people taller, and end up having to scramble to keep Big Pharma from discovering the Warehouse. Meanwhile Artie, Steve and Claudia track Brother Adrian to his hideout, where he has laid a deadly trap.
Original air date: 09/17/2012 Runtime: 43:04 min. Pete and Myka investigate the case of people literally rusting away in a West Virginia mill town. Steve and Claudia visit his hometown in New Jersey in a bid to end his dependence on the Metronome. Artie tells Mrs. Frederic and H.G. Wells the truth about Brother Adrian and his use of the Astrolabe.
Original air date: 09/24/2012 Runtime: 42:59 min. To pressure Artie into reversing the Astrolabe's effects, Brother Adrian sends deadly artifacts to Myka's pregnant sister, Pete's ex-wife and Claudia's brother. As the agents race to save their loved ones, Mrs. Frederic and Steve go to the Vatican where they discover an impossible truth about Artie and Adrian. By the end of the day, one team member lies dead in Warehouse 13.
Original air date: 07/08/2013 Runtime: 43:02 min. The evil alchemist Paracelsus is on the run, and Pete and Myka must stop him before he achieves immortality - or something worse. Myka fights what appears to be a losing battle against cancer, while Steve learns Artie's been keeping life-altering information from Claudia.