When a volcanic event at an Arkansas State Prison allows two inmates to escape, Pete, Myka and Steve must partner with a U.S. Marshal to track down the fugitives.
H.G. has created a new life for herself in Wisconsin, but calls in the agents when she comes up against an unidentified artifact. Meanwhile, Abigail joins the others on the floor of the Warehouse to track down the source of mysterious tremors that threaten to destroy the building.
Pete and Myka head to Vegas to investigate murders that are tied to the world of high magic. Meanwhile, Claudia and Jinks search for an artifact used to rig horse races, while Artie meets the new B&B owner, Abigail Cho.
Pete and Myka get sucked into a 1940s detective noir novel in search of an artifact. Meanwhile, Artie, Steve, and Claudia chase down a phantom car thief.
While Pete and Claudia travel to Oregon to investigate a series of earthquake-related accidents occurring in a National Park, Artie deals with the repercussions of Leena’s death.
With the fate of the world in their hands, Pete and Myka’s only hope of finding a cure to the Sweating Sickness is a drunken history professor. Meanwhile, Steve and Claudia enter Artie’s subconscious in an attempt to bring him out of his coma before he fades away for good.
The team have no time to mourn a fallen comrade as they go after the person responsible, the nemesis that has been stalking Artie since he used Magellan’s Astrolabe to save the world.
Pete, Myka, and Claudia set off to rescue their loved ones when Brother Adrian sends them deadly artifacts. Meanwhile, Mrs. Frederic and Steve travel to Rome and learn Adrian’s dark secret.
Pete and Myka investigate a case of people rusting away. Steve and Claudia visit Steve’s hometown to end his dependence on the Metronome. Meanwhile, Artie tells the truth about Brother Adrian and his use of the Astrolabe.
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.