SPOILER ALERT!! - Abby (Julie Graham) and her friends find themselves on the run from Samantha (Nikki Amuka-Bird) and Dexter (Anthony Flanagan), who have formed a dangerous alliance that threatens everyone’s freedom. Meanwhile, Sarah (Robyn Addison) is confronted by a face from the past which leads her to betray her new friends. When Naj (Chahak Patel) goes missing, the family is forced to face the dangers of the city in order to find him. Their food and water supplies have been stolen from their car by desperate urban survivors, so they know they may not be able to survive long enough to find Naj. The family is nearly torn apart when Greg (Patterson Joseph) and Abby find themselves on opposite sides of an argument.
Meanwhile, Naj is befriended by a feral boy named Darren (Anthony Hudson) who lives with the sinister Craig (Adam Kotz) and June (Katie Lyons). They look after a group of children who forage amid the ruins of the city, in return for shelter and protection. Naj soon sees that Craig is ruthlessly exploiting Darren and the others, but without Abby, he faces a struggle to save himself. With his adopted family searching for him in the deserted city, time is rapidly running out and Dexter is only a step behind them all…Episode six (Season One finale) airs Saturday, March 20th @ 9:00 p.m. EST/PST on BBC America.