Guest Stars El Anthony as Mark De Costa Jonah Collier as Young Robert Napper Anya Cooke as Young Napper's Sister Deka Walmsley as DCI Mick Wickerson Natasha Jayetileke as Newsreader Anna Tierney as Samantha Bisset Jack Riddiford as Robert Napper Simon Kunz as Justice Ognall Jasper Jacob as John Nutting QC Simon Armstrong as SIO Micky Banks Bruce MacKinnon as William Clegg QC Crispin Letts as Psychotherapist Adam Loxley as Camping Man Nick Malinowski as DS Alan Jackaman Simon Wilson as Jim Sturman QC Alexia Russell as Jazmine Bisset Michael Ukandu as Prisoner 1 Mark Ellul as Prisoner 2 Susan Gillias as Female Prison Officer
