UK TV · Crime & Investigation
999: Killer on the Line: how many seasons and episodes, and where it airs in the UK
Quick answer · UK
999: Killer on the Line has 2 seasons and 16 episodes on Crime & Investigation (2016–2018).
999: Killer on the Line is a UK crime and documentary series on Crime & Investigation, which ran from 2016 to 2018, with 2 seasons and 16 episodes. 999: Killer on the Line has ended; its final episode aired on Monday, August 27, 2018.
999: Killer on the Line seasons (2 seasons, 16 episodes)
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 8 | April 18, 2016 | June 6, 2016 |
| Season 2 | 8 | July 9, 2018 | August 27, 2018 |
Original UK air dates on Crime & Investigation.
Common questions
How many seasons of 999: Killer on the Line are there?
999: Killer on the Line has 2 seasons and 16 episodes, first airing on Monday, April 18, 2016.
Has 999: Killer on the Line ended?
999: Killer on the Line has ended; its final episode aired on Monday, August 27, 2018.
What channel is 999: Killer on the Line on in the UK?
999: Killer on the Line aired on Crime & Investigation. Past episodes are often available on the broadcaster's own catch-up app.
Who stars in 999: Killer on the Line?
The main cast includes Geoffrey Newland.
Source: TVmaze (CC BY-SA), retrieved November 4, 2026.