Benedict Cumberbatch as Dad

David Thewlis as Crow (voice)

Sam Spruell as Paul

Vinette Robinson as Amanda

Leo Bill as Dr. Bowden

Garry Cooper as Keith

Jessie Cave as School Mum

Adam Basil as The Demon

Lizzie Clarke as Rose

Tim Plester as Andy

Dwane Walcott as Mr Mark

Eric Lampaert as Crow

Kevin Howarth as The Demon (voice)

Pierre Bergman as Neighbour

Max Porter as Male Guest

Lesley Molony as Margaret

Claire Cartwright as Mum

Nandi Bhebhe as Mrs A

Mat Wright as Dan Graves / Simon Colebrige

Rimca Karmakar as Female Guest

Richard Boxall as Boy 1

Henry Boxall as Boy 2

Steve Paget as Police Officer