Chloe, Sacha and Jonathan have made it to London and continue their search for Jonathan's family, with Sacha certain of their survival due his continuous dreams about Emily.

Bill forms an uneasy alliance with one of the aliens.

Bill makes a request that puts Zoe in danger.

Catherine and Bill are finally united in London.

Catherine, Sophia, Zoe and the other survivors finally reunited prepare for the ultimate attack. But it is Bill who is the only one who holds the fate of mankind in his hands, provided he is helped by Isla.