Guest Stars Mandana Jones as Nasreen Sayyad Indira Varma as Lisa Douglas Steven Brand as Paul Douglas Ray Fearon as David Kumalah Ellise Chappell as Wendy Roberts Ben Caplan as Michael Freeland Nick Barber as Ralph Finch Ace Ruele as Armah Alana Hood as Susan Malik Haluk Bilginer as John Malik Mark Frost as Samuel Armstrong Simon Poland as Hamish Coltraine Jim English as William Gardner Luke Mullins as Alex Graham Ben Dilloway as Dr James Benson Emma Clifford as Amanda Clarke Antoine Allen as Foday Tolga Safer as Yusef Alex Humes as Locksmith Kate Duchêne as Harriet Turner Guy Williams as George Reynolds Theo St. Claire as Chugger Chook Sibtain as Ayjay Kapour