Guest Stars Nicola Sanderson as SOCO Joy Ackroyd Adelayo Adedayo as Kayla Cyril Nri as Judge DeMarco Ramon Tikaram as Vijay Prasad Holly Earl as Lisa Gardner Hattie Morahan as Alison Gardner Carolyn Pickles as Maureen Riley Antonia Clarke as Anna Sands Mandana Jones as Dr. Antonia Carey Ted Reilly as Paul Downing Mark Frost as Dr. Philip Gardner Greg Patmore as Barry Downing Clive Hayward as Jonathan Shale Damian Kell as William Farmer Emma Davies as Mary Sands Jude White as Riley Gardner Scarlett Milburn-Smith as Heather Downing Uncredited Robert Glenister voices Opening Narration