I should have called it before Second Chance. I had a vibe that Brother Adrian was the evil and not Claudia since he was shaping up to be the evil and put others at risk. It didn't seem likely that Claudia would be the evil since things were going her way (for the most part). Brother Adrian, on the other hand, was overly obsessed with his job (perhaps rightly so in some ways) and decided to release some of the artifacts in the Warehouse to get Artie to reuse the Astrolabe. Considering there haven't been any new characters in the season so far, he seemed the more likely candidate.