The lives of five people are forever changed when a mysterious alien ship appears on the skyline over Bristol. Its intentions unclear, the disparate group attempt to flee the city and reach loved ones, but their efforts are impeded by a city in panic, looters, and the threat of military attack. As they battle to stick together, loyalties and relationships are tested, and an even larger question remains: who are these mysterious visitors and why are they here?
| Title | Horizon |
|---|---|
| Subtitle Available |
 ETC.
|
| Alternative Titles | |
| First Air Date | 2015-10-05 |
| Last Air Date | 2017-11-03 |
| Number of Episodes | 20 |
| Number of Seasons | 2 |
| Genres | , |
| Networks | , |
| Casts | |
| Plot Keywords | , |
