The family, scavenging for survival in the city, discover that other people have been abducted in the same way as Abby. Tom, Al, Anya and Sarah set off in pursuit of a pharmaceutical company with offices in the city, while Greg and Naj are confronted by a group from which Tom has stolen supplies. At the lab, Whittaker re-infects Abby with the virus.
Elenco: Max Beesley , Zoe Tapper , Paterson Joseph , Phillip Rhys , Julie Graham , Robyn Addison , Nicholas Gleaves , Nikki Amuka-Bird , Chahak Patel , Freema Agyeman , Shaun Dingwall .