Billy believes his friends and family have been replaced by doubles. His psychiatrist believes this is a delusion. Meanwhile, Billy's carrying out an experiment to prove it's no delusion.
Arthur Darvill
Billy
Kate Ashmead
Doctor
Phoebe Waller-Bridge
Anna
Kevan Brighting
News Reader (voice)
The Experiment
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The Ghoul
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Little Boy Blue
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Chatroom
Hider in the House
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The Truth About Emanuel
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The Good Neighbor
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Luce
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A Crooked Somebody
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Shock Corridor
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Elephant Song
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Stay
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Sympathy for the Devil
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6 Below: Miracle on the Mountain
The Cut
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Run
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Tyler Perry's Duplicity
The Devil's Double
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Reservoir Dogs
