Borderline is a British mockumentary television comedy series devised by Michael Orton-Toliver and Chris Gau. Narrated by Ralf Little, the series launched on 2 August 2016 on Channel 5. The series follows the activity of customs agents working for Borderline, a fictionalised version of the Border Force, at the fictional Northend Airport.
In contrast to most series, which require the cast to memorise a script, Borderline is "retro-scripted": the cast is given a plot outline to guide them as they improvise their dialogue and actions.
As of December 2016, the series is available on Netflix in select regions.
In February 2016, it was announced that Channel 5 had ordered a new comedy series. The news was revealed by Royle Family star Ralf Little.
The first series was filmed at Coventry Airport in March/April 2016.
In August 2016, during the first series run it was announced by Ben Frow (Channel 5's Director of Programming) that the show had been commissioned for a second series.
On 19 October 2017, Channel 5 had announced Borderline would not return for its third series due to a drop in ratings and just 12 episodes were produced in two series.