Set in a psychiatric hospital in 1947, it's expected that the antiquated and barbaric treatments of the time would be seen in full force. Lobotomies are the most prevalent, with Dr. Richard Hanover performing both a transorbital lobotomy and one that requires a hole being drilled into the head in episode two. Nurse Mildred Ratchet also performs a lobotomy in the episode, although hers is more sinister in nature and is heard rather than seen.
The other horrifying treatment involves hydrotherapy, with the patient essentially being boiled before being immersed in an ice cold bath. While patient Ingrid is merely traumatized from her experience in episode three, private investigator Charles Wainwright isn't so lucky. Mildred tricks him into coming to the hospital and locks him in the hydrotherapy chamber in the hopes that he'll be boiled alive. He escapes but is left looking like a gruesome monster before being shot in the head in episode four.