Duncan

Brendan Patricks

No. 5: Gemma

Naomie Harris

No. 1: Wendy

Kelly Adams

No. 2: Olive

Jane March

No. 3: Rhona

Cécile Cassel

No. 4: Natalie

Edith Bukovics

Will

Daniel Hoffmann-Gill

No. 5 - Detective Burnam

Michael Sheen

Duncan World - Rollercoaster Alan

Mark Benton

No. 1 - Self

Johnny Ball

No. 1 - Duncan's Sister

Ellen Hughes

No. 1 - Divine Dating (voice)

Duncan Wisbey

No. 1 - God

John Line

No. 1 - Alex

James Thorne

No. 2 - Doctor

Phillip Lowe

No. 3 - Mr. Paul

Aziz Mirza

No. 4 - Party Guest

Neil Chordia

No. 4 - Accountant on Street

Michael Beckett

No. 4 - Agent 1

Melvin Odoom

No. 4 - Agent 3 / Guppy (voice)

Dave Chapman

No. 4 - Agent 4

Ian Kirkby

No. 4 - Girl on Platform

Holly Lucas

No. 5 - Supermarket Security

Ben Bishop

No. 5 - Young Gemma

Tia Campbell

No. 5 - Giles

Louis Greatorex

No. 5 - Kid at Camp

Molly Windsor

No. 5 - Detective Lister

Chris Gascoyne

No. 5 - Award Guest

Gail Renard

No. 5 - Award Guest

Iain Lauchlan

No. 5 - Vox Pop

Mark Whiteley

No. 5 - Shakespeare

Nicholas Asbury

No. 5 - Agony Aunt

Denise Robertson

Duncan World - Ted

Brendan O'Hea