Kathryn Hall is a specialist in placebo studies and therapeutic encounter. She appeared as Herself in the episode Adam Ruins Spa Day. This article is a stub. You can help Adam Ruins Everything Wiki by expanding it. Retrieved from "https://adam-ruins-everything.fandom.com/wiki/Kathryn_Hall?oldid=2916" Categories: Article stubs Guests Experts Community content is available under CC-BY-SA unless otherwise noted.