Guest Stars Charlie May-Clark as Cathy Calvert Kate O'Flynn as Dr. Peep Mia Blakeley as Tessa Kowalska Ben Tavassoli as Alpha Risteard Cooper as Laurie Gaskell Peter McDonald as Patrick Llewellyn Samantha Morris as Teresa Adamson Janet Cork as Jocelyn Wade Andrea Gillies as Lucy Cooke Francis Magee as Shane Mercy Daniel Ezra as Ajamu Skye Lourie as Jogger Priyanga Burford as Dr Venkateson Rob Mallard as Neil Matt Sutton as PCSO Geoffrey Burton as Bilal John Catterall as Ambulance Tech