David Tennant

Character: RD Laing

Elisabeth Moss

Character: Angie Wood

Michael Gambon

Character: Sidney Kotok

Gabriel Byrne

Character: Jim

David Bamber

Character: John Meredith

Olivia Poulet

Character: Maria

Adam Paul Harvey

Character: Paul Zemmell

Jerome Holder

Character: John Holding

Linda Hargreaves

Character: Mrs Holding

Declan Wilson

Character: Mr Holding

Lucie Glynn

Character: Joan Walker

Cia Allan

Character: Mrs Walker

Trevor White

Character: Bryan

Rebecca Gethings

Character: Jane Simons

Lydia Orange

Character: Sarah

Tom Richards

Character: Raymond

James Utechin

Character: Sam

Alexandra Finnie

Character: Susie Laing

Ruby Winter

Character: Karen Laing

Alistair Stoddart

Character: Laing Child

Jake Saville

Character: Laing Child

Amelia Leather

Character: Laing Child

Isaac Benn

Character: RD Laing as a Child

Nigel Barber

Character: Dr Bloom

Paul Hunter

Character: Glasgow Consultant

Bryan Bounds

Character: Radio Host

Matthew Jure

Character: Richard Long

Kelby Keenan

Character: Olivia Keenan

Alex Walton

Character: Sean

Zara Plessard

Character: TV Presenter

Aaron Taylor

Character: Pieter Kotok

Caitlin Innes Edwards

Character: Mrs Kotok

Leo Heller

Character: Young Sidney

Richard Calder

Character: Chairman / Psychiatrist

Philip Gascoyne

Character: Psychiatrist

Victor Ptak

Character: Psychiatrist

Stephen Schreiber

Character: Psychiatrist

David Annen

Character: Psychiatrist

Helen Belbin

Character: Amelia Laing

Peter F. Gardiner

Character: David Laing

Wendy Barrett

Character: Anne Laing

Alastair Natkiel

Character: Guest at Jazz Club

Maya Chesca Miles

Character: Fran Klein

Lanna Joffrey

Character: Eleanor Goodhart

Sam Booth

Character: Michael Lear

Nicola Simonds

Character: Kingsley Hall Guest

Judith Alexander

Character: Social Worker

Striker John

Character: Policeman

Michael Smoker

Character: Policeman

Jeannie McGinnis

Character: Airport Check-in Woman

Jamie Edgerton

Character: Barman

Mike Shoring

Character: Tai Chi Instructor

Redford Glynn

Character: Baby Gabriel