One of the most important details of Westworld was the inclusion of flies – used to indicate which people were an android and which people were actually humans. What I didn’t realize until very recently was that the flies were actually real! I assumed it was all clever CGI.

The way they did it was to used partially frozen flies, and it was the job of someone known as a ‘fly wrangler’ to stick the partially frozen fly to the faces of the actors. Once the fly began to thaw, it would crawl around the face (still a bit dizzy from being frozen so unable to fly). I love these little details because it shows how much thought went into the show!
Westworld will always be one of my fav shows!
More info about the flies here –¬†https://www.latimes.com/entertainment/herocomplex/la-et-hc-evan-rachel-wood-westworld-20161003-snap-story.html