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The evil alchemist Paracelsus is on the run, and Pete and Myka must stop him before he achieves immortality; Myka fights what appears to be a losing battle against cancer.

Warehouse 13

The Truth Hurts

The team tracks an evil alchemist who has bronzed Claudia and stolen the only artifact that can reverse the process; Claudia's condition apparently affects both Mrs. Frederic and the Warehouse.

All the Time in the World

A lead on a cache of artifacts stolen from Warehouse 12 by the infamous pirate, Roaring Dan Seavey.

Lost & Found

When residents of a posh gated community begin to be affected by a mysterious, versatile artifact, Myka and Pete investigate.

What Matters Most

When a volcanic event at an Ark. State Prison allows two inmates to escape, Pete, Myka and Steve must partner with a U.S. Marshal to track down the fugitives.

Runaway

HG Wells contacts Pete and Myka out of the blue to give them a tip, launching an investigation into an artifact that scares people to death.

Instinct

Mrs. Frederic introduces Artie to Abigail Chow, the new B&B manager.

The Sky's the Limit

Pete and Myka are transported into a crime novel.

The Big Snag

Pete and Claudia investigate a series of earthquake-related accidents.

Parks and Rehabilitation

Pete and Myka race to stop a global plague before it kills half the world's population.

The Living and the Dead

Artie tries to release a deadly virus that could wipe out half the world's population.

We All Fall Down

Brother Adrian sends deadly artifacts to the agents' loved ones; Mrs. Frederic and Steve discover the truth about Artie and Adrian.

The Ones You Love

Two government agents search the country for supernatural objects.

S4 E17 | What Matters Most

E20 | The Truth Hurts

E19 | All the Time in the World

E18 | Lost & Found

E17 | What Matters Most

E16 | Runaway

E15 | Instinct

E14 | The Sky's the Limit

E13 | The Big Snag

E12 | Parks and Rehabilitation

E11 | The Living and the Dead

E10 | We All Fall Down

E9 | The Ones You Love