When Sarah Pinborough's Behind Her Eyes was released in 2017 the hype surrounding the book understandably focused on its ending. In a post-Gone Girl world, every thriller lives and dies on the strength of its twist, and while the ending of the Behind Her Eyes book is divisive, it's also audaciously weird enough for its #WTFThatEnding marketing campaign to feel legit. So, it's only natural when comparing the show Behind Her Eyes to the book, you'll find that Netflix mostly preserved the bonkers ending of the novel.

Still, there are some key differences to Behind Her Eyes' show ending that make it ever so slightly less haunting than the nightmarish final pages of Pinborough's controversial book. And if you're reading this after watching all six episodes of the miniseries and wondering how the twist could possibly have been even more disturbing in print, well then buckle up. It's time to dive deep into the subtle changes the show's writers, Steve Lightfoot and Angela LaManna, made to make the final moments of the show slightly more palatable for viewers — and I do mean slightly.

Cat lovers, you might want to turn back now. (Warning: Spoilers for Behind Her Eyes follow.)

David Is The Architect Of Adele's Downfall

One of the most interesting omissions from the show is the reveal that it's David who gives Adele a book on dreams that leads to her mastering lucid dreaming and astral projection at a young age. Adele ends up revealing this to Rob shortly before he tricks her into swapping bodies with him, and the book also notes that Adele tells David all about her abilities, but he thinks she's making it all up. Basically, in a roundabout way, this means David is responsible for everything that happens to him, Adele, and Louise.