The Aliens

Lewis is a border guard at the checkpoint that patrols the wall between aliens and humans in the UK. After a chance encounter with Lilyhot, a mysterious alien, Lewis' life is thrown upside down when he discovers that he is half-alien.

After Lilyhot reveals to Lewis that his real alien father Antoine is in prison, Lewis agrees to help break him out. But when they finally meet for the first time, their relationship gets off to a rocky start.

Antoine is paid a visit by Lilyhot who tries to persuade him to start a gang war with Fabian, telling him that he can beat Fabian and take over Troy again. But Antoine isn't interested, he just wants a quiet life.

With his suspicions of Lewis growing, Truss decides to follow him into Troy. However, Truss is spotted in Troy by the Alien League, a movement that fights for alien equality, who then start to hunt him down.

After accidentally preventing a hit on the human side ordered by Fabian, Dominic is forced to become a hit man himself, and is tasked with murdering small time drug-dealer Sean.

[Season Finale] With the gang war raging and Aliens amassing at the border, Troy is put into lock down – no one in, no one out. But Lewis is desperate to be at his father Antoine's side and support him in his battle for supremacy against Fabian.