Frank & Louis

Kingsley Ben-Adir

Frank

Rob Morgan

Louis

Residente

Julian (as René Pérez Joglar)

Rosalind Eleazar

Trish

Indira Varma

Dr Watts

Andy Cheung

Chao

Georgia Goodman

Prisoner Intake Officer

Matthew Shelby

Guard Joyce

Julian Clapton

Transfer Guard (uncredited)

Calum MacPherson

Barney

Ailema De Sousa

Miss Valentine

Matt Brewer

Patrick