Guest Stars Toheeb Jimoh as Marcus Pete MacHale as Leon Ursula Holliday as Cass Stewart Anneika Rose as Natalie Carlyss Peer as Martha Freeman Sheila Atim as Amanda Javad Olivia Morgan as Tia Anna Koval as Gwen Ashe Michael Wildman as ICSA Agent Ryan Aoife Hinds as Lyla Bhavik C. Pankhania as ICSA Officer Finbar Lynch as Aidan Doyle Gareth Mason as Luke Gary Shelford as Steve Rez Kempton as Patrick Francis