David Mitchell

as John 'Ludwig' Taylor

Anna Maxwell Martin

as Lucy Betts-Taylor

Dipo Ola

as DI Russell Carter

Gerran Howell

as DC Simon Evans

Izuka Hoyle

as DS Alice Finch

Dylan Hughes

as Henry Betts-Taylor

Dorothy Atkinson

as DCS Carol Shaw

Sophie Willan

as Holly Pinder

Ralph Ineson

as Chief Constable Ziegler

Derek Jacobi

as Mr Todd