Guest Stars Nicholas Briggs voices Dalek Voice Charlotte Ritchie as Lin Nikesh Patel as Mitch Daniel Adegboyega as Aaron Sinclair Darryl Clark as Police Officer Will Michael Ballard as Sergeant Sophie Duval as Mum Laura Evelyn as Call Centre Polly Connor Calland as Security Guard Richard Callum McDonald as Teen 1 Harry Vallance as Teen 2 James Lewis as Farmer Dinkle