Guest Stars Ambika Mod as Shruti Rory Fleck Byrne as Harry Philippa Dunne as Ria Hannah Onslow as Erika Michele Austin as Tracy Rosie Akerman as Paula Alex Jennings as Mr. Lockhart Tom Durant-Pritchard as Greg Josie Walker as Non-Reassuring Trace Michael Workeye as Ben Agata Jarosz as Agnieska Sara Kestelman as Mrs. Winnicka Yasmin Wilde as Benilda James Corrigan as Welly Sarah Durham as Anna Grace Cookey-Gam as Amie Marion Bailey as Callie's Mother Heather Agyepong as Rachel Andreea Paduraru as Andrea Alice Bailey Johnson as Callie Marcel Dorian as Andrea's Husband Andrew Nolan as Graham