In the Warehouse 13 Season 4 episode " An Evil Within ," Pete and Myka investigate hallucinations caused by H.P. Lovecraft’s Silver Key while Artie faces the consequences of the Astrolabe. The episode also features Claudia successfully resurrecting Steve Jinks with the Metronome, all while under the watchful eye of the Regents. You can find a detailed summary on Screen Rant and TV Fanatic . Warehouse 13 Season 4 Episode 2 Recap: An Evil Within