Philip K. Dick's Electric Dreams

Safe & Sound (1x9)

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When 15-year-old Foster moves from the small town to the big futuristic city, she's consumed with paranoia and fear by the urban society's emphasis on security and terrorist prevention. It isn't long before she turns to a friendly "tech support" voice for guidance and companionship... but is the voice real, or just the product of her own increasingly irrational delusions?