What Do The Flies Do In Westworld Season 4?
Short Answer
The parasite flies infect humans so Halores's tower system can make them responsive to commands and loops.
Connected Story Threads
Halores begins as a copy of Dolores.
Halores builds William's host copy as an enforcer.
Halores makes infected humans live through citywide loops.
Related Characters, Places, and Concepts
More Questions About Parasite Flies
The Tower is Halores's control system that sends signals to infected humans and keeps them inside citywide behavioral loops.
Season 4 reverses Season 1 by turning humans into looped beings inside a controlled city while hosts occupy the position of watchers and rulers.
After the Tower's collapse, Halores's controlled world falls into chaos, host William turns survival into a final game, and physical civilization moves toward extinction.
Halores is the Dolores copy living in Charlotte Hale's host body who eventually becomes a separate ruler and antagonist.
Halores turns against Dolores after living Charlotte Hale's life, forming attachments, and suffering the death of Hale's family, which makes her identity diverge.
Christina is a version of Dolores who believes she writes game stories while unknowingly shaping human loops in Halores's world.