After Elizabeth Olsen's WandaVision concluded in 2021, it was reported that Agatha Harkness would return to our screens with a new TV series focusing on Marvel's most notorious witch.

While Agatha is breaking down the title of the book stolen from the library, a paper under her notepad features "Bellevue," a fun little Easter egg. In the comics, Bellevue Hospital in New York is a recurring location for many Marvel heroes and villains, including the Night Nurse, Daredevil, Ms. Marvel, and Bullseye.

And it is filled with all sorts of deep cut Marvel lore and Easter eggs from WandaVision, Doctor Strange in the Multiverse of Madness, and a whole lot more. For example: The book that Agatha investigates in the faux crime show that makes up most of the series premiere is written by someone named “Andrew Ugo” — which is an anagram for