Season 1
Horizon
Épisodes
Arrival
In the aftermath of a near fatal car accident, four people returning from a funeral realize nothing will ever be the same when they look to the sky and see a mysterious alien ship hovering over their home city.
Evacuate
The group return home and, amid news-casts warning them to stay put, struggle to decide what they should do next. As they attempt to track down a missing family member, a horrible realization about her whereabouts comes to light.
Reunion
Steven heads into the city alone to try and track down his missing step-sister, but matters are complicated when it appears the people she is with may not be willing to let her go without a fight.
Supplies
Dan, Chloe and Nicole head to the local supermarket to try and get supplies, only to find it has been overrun with looters. The group must fight for their survival when a confrontation inside turns violent.
Sanctuary
Steven and Katie reach the local church in their efforts to find Sarah. As the priest inside encourages them to stay with the rest of his congregation, Steven battles with how best to protect his family.
Sanders
Nicole finds herself in the company of a mysterious stranger, and must decide who she can trust when he asks for her help in an unusual matter.
Infection
Dan and Chloe take shelter in her parents home. As they try to cope in the aftermath of events at the supermarket, things turn deadly and it is clear they're not out of danger just yet.
Secrets
Nicole and Sanders have to work together when their mysterious new visitors turn against them, and they are forced on the run.
Past
We meet the group before things all began and see how they came together, but did they receive forewarning of the impending attack?
Safe
Still separated, the group all make a last ditch attempt to reach the farm-house, but are they truly safe?