Warning: This post contains spoilers for Behind Her Eyes.
Behind Her Eyes has a big twist that a lot of people are talking about — but there are many little moments that hint at it in the lead-up to the final episode.
1. There's a blue-light orb in the title card.
2. Adam's night-light changes from green to blue.
3. We see Rob-in-Adele astral-project early on, although we don't know it at the time.
4. In fact, in most scenes with David and Louise after this, there are shots from above, indicating that Rob is watching.
5. In one of the later scenes, we can faintly see the blue light that is Rob's orb surrounding his point of view.
6. We learn that Rob's orb is blue when we see him and Adele astral-project together for the first time. Adele's real orb is pink.
7. Reinforcing their orb colors, Louise almost always wears green and has green decor in her home, while Adele is often surrounded by the color blue and also wears the color — often in combination with pink, possibly hinting at the combination of "Adele" with Rob.
8. The body switch with Louise is hinted at in a casual conversation about how she'll change Adele's life.
9. We don't realize it at the time, but the way Adele meticulously scopes out Louise's apartment indicates her intentions to astral-project and watch her.
10. We never see any flashbacks in which Rob doesn't appear — they're always from Rob's point of view, showing his memories and not Adele's.
11. In the flashbacks, Adele hints at her "sleep" problems. We later learn that she is actually "traveling" — i.e., astral-projecting.
12. Flashback Adele — the real Adele — is a very different person from present-day Adele, who is actually Rob. Adele is kind and caring, trusting and generous — the exact opposite of how we see Rob-in-Adele behaving throughout the series.
13. There are actually repeated instances of Adele talking about her life in a way that doesn't match up with what we know of her — but does match up with Rob.
14. The elaborate meals that Adele cooks for David are also a hint — Rob is the one who had excellent cooking skills, not Adele.
15. There's also Adele's heroin use in the present, which is a great flashing neon sign that she's actually Rob.
16. In the flashbacks, after Rob has possessed Adele, we see her behaving as he did — such as hiding by the entryway as David arrives at the estate.
17. The way Adele (who is now Rob) describes Rob's life is also a callback to his original descriptions of how shitty it is.
18. And from the moment Rob inhabits Adele's body, David has difficulty looking in her eyes.
19. Meanwhile, Rob in the flashbacks repeatedly references his obsession with Adele and everything about her and her life, and how he'd love to switch with her.
20. He even explicitly refers to Adele as an "escape" from his life, foreshadowing what he will do.
21. Finally, just before they switch bodies, Adele gives Rob a nice box to keep his drug paraphernalia in, and he comments that it's "something to remember you by," hinting at his sinister intentions.
