The Bellevue Hospital is located inside a large building that is spread over several floors and also consists of Insane Pavilion, a criminal asylum ward where the most dangerous inmates are held inside cages. The hospital is completely fenced and can be accessed through a large gate with the hospital sign on a plate. The ward dedicated to criminals – which can only be accessed through a series of corridors closed by gates, and guarded by employees – is located in the dark and damp dungeons, where the suspects are chained in order to keep them at bay. A fair number of guards are also assigned the task of providing frozen showers to the most unstable and noisy inmates.
New York City, 1896. Dr. Laszlo Kreizler accompanied by his old friend John Moore, visited the Bellevue Hospital to question Henry Wolff, suspected of the murder of Giorgio Santorelli, the so-called "Boy on the Bridge." Once in the hospital, Kreizler was briefed by Doctor Fuller that Wolff was guilty of another murder. During a fight with Edwin Band, Wolff had stabbed his friend twenty times, killing him. Once in the criminal ward, Kreizler managed to inquire, discovering that Wolff was guilty only of Band's murder, triggered by jealousy. 
Weeks later, Dr. Laszlo Kreizler asked his colleagues at Bellevue if he might have conducted an interview with Charles Blythe. Blythe was recently admitted to the hospital because he ferociously murdered dogs and didn't show any remorse. Instead, he tried to blame Chinese neighbors based on prejudices. 
- An in-universe depiction of the real Bellevue Hospital, founded March 31, 1736, and located on First Avenue in the Kips Bay district of Manhattan, New York City. It is the oldest public hospital in the US.
- Ep. 1: The Boy on the Bridge
- Ep. 4: These Bloody Thoughts (mentioned)
- Ep. 10: Castle in the Sky (mentioned)
- ↑ Hossein Amini (writer) & Jakob Verbruggen (director); (January 22, 2018); "The Boy on the Bridge". Episode 1. The Alienist. TNT
- ↑ Gina Gionfriddo & Cary Fukunaga (writers) & James Hawes (director); (February 12, 2018); "These Bloody Thoughts". Episode 4.The Alienist. TNT
- ↑ Cary Fukunaga, John Sayles & Chase Palmer (writer) & Jamie Payne (director); (March 26, 2018); "Castle in the Sky". Episode 10.The Alienist. TNT