Complete story — includes the ending
The dearest people to Claudia, Pete, and Myka are in danger from artifacts sent to them by Brother Adrian. While they rescue their family, Steve and Mrs. Frederic go to the Vatican. They discover that the brotherhood has a dark secret. They also find Brother Adrian attacking the Warehouse is a figment of Artie's imagination and that he is having a psychotic break. The nature of the evil that Artie has created is revealed as himself - the astrolabe has caused Artie to suffer a mental breakdown that has caused him to hallucinate a malevolent apparition of Brother Adrian that "steals" artifacts and unleashes them on his loved ones. In reality, Artie has been stealing the artifacts and unleashing them while in his Brother Adrian "persona." Leena is killed while trying to help him. Artifacts: Thomas Jeffries ' Boomerang, Mehmed II.'s Silken Cord, Ignacy Hryniewiecki 's Tattoo Box, Pliny the Elder 's Amber Scroll, Rembrandt van Rijn 's Painting Frame, D. B. Cooper 's Ripcord
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Warehouse 13 season 4. HTML formatting and reference markers removed. · Content license