Guest Stars Toheeb Jimoh as Marcus Ursula Holliday as Cass Stewart Pete MacHale as Leon T'Nia Miller as Charlie Morris Laurie Kynaston as Jonah Green Carlyss Peer as Martha Freeman Sheila Atim as Amanda Javad Kwong Loke as Hau Jonny Dixon as Nevin Shereen Martin as Sen Michael Higgs as Alec Sydney Rae White as Nurse Jane Micah Balfour as ICSA Agent John Omole as Police Officer