Guest Stars Stephen Walters as Robbie Shaw Sian Reese-Williams as Tina Harcourt Alexa Davies as Lucie Hudson Gabrielle Glaister as Donna Collyer Ben Caplan as Peter Harcourt Geoff Bell as Brian Collyer Isis Davis as Cheryl Wilkes Michael Maloney as Judge Christopher Lansing Tahliya Lowles as Poppy Harcourt Sienna Sayer as Daisy Harcourt Ellie Dadd as Cat Shaw Zoe Harrison as Carol Alexander Joy Richardson as Mrs. Lasher Liam Ainsworth as Owen Gillick Seraphina Beh as Jade Brandyce Garry Robson as DI Sid Clarke Janine Wood as Sharon Evelina Raymond Coulthard as D.S. Donald Hart