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# Upgrade

Band 60 Leigh Whannell 2018

### STEM / AI frequency implant

STEM interfaces with Grey's nervous system through frequency matching — it reads and writes his 72-band motor control vector. The healing machine uses the same interface.

### AI takeover / Frequency hijack

STEM's takeover is a frequency layer shift — it overwrites Grey's bands with its own signature. The Observer detects the hijack by measuring harmonic drift.

"Everything is science fiction, until it is just science."