SPOILER ALERT!! - Reunited and on the road, the group travels South on the lookout for a new home. They encounter a small but thriving community of survivors and, after some initial trepidation, decide to take up their offer of hospitality. While Al (Philip Rhys) and Sarah (Robyn Addison) enjoy their new romance, Tom (Max Beesley) simmers as Anya (Zoe Tapper) makes friends with the new community's leader, Judy (Morven Christie). Greg (Paterson Joseph) and Abby (Julie Graham) leave together to follow up their own investigations: Greg into a mysterious postcard he was sent shortly before the virus hit, and Abby into the Lab and the imprisoned survivors she met during her time there. Meanwhile, Sarah discovers an elderly couple dying from a new, mutant strain of the virus. Episode 11 airs Tuesday, April 20th @ 9:00 p.m. EST/PST on BBC America.