John Krasinski, o diretor do Quiet Place , discutiu os alienígenas em um 11 de abril Empire Film Podcast . Um artigo Collider transcreveu várias citações de Krasinski do podcast, nas quais ele descreveu como ele formou sua ideia para os alienígenas e como eles evoluíram:
"They are absolutely aliens. They’re from another planet. Where I developed the idea of them and what I wanted them to look like was most alien movies are about takeovers, agendas, they’re a thinking alien creature, and for me this idea of a predator, this idea of a parasite, this idea of something that is introduced into an ecosystem [was interesting]. One of my favorite movies I love to watch is RocknRolla and they tell that whole story about the crawfish in the Thames and that’s what I mean, the introduction of something that can’t be held back."
"I remember a terrible joke that I said was it would be—it’s disgusting and disturbing but it’s true—it would be like releasing wolves into a day care center. That’s how the world responds."
"The idea behind all that is they’re definitely aliens and they’re an evolutionarily perfect machine. So the idea is if they grew up on a planet that had no humans and no light then they don’t need eyes, they can only hunt by sound. They also develop a way to protect themselves from everything else so that’s why they’re bulletproof and all these things."
Ele também disse que algo causou uma explosão no planeta dos alienígenas, resultando em meteoróides carregando os alienígenas para viajar pelo espaço e cair na Terra:
"And the other idea was [the armor is] also the reason why they were able to survive kind of the explosion of their planet and then survive on these meteorites, because they’ve evolved to be bulletproof. Until they open themselves up to be vulnerable, they’re completely invulnerable."