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.

[1] 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.

[3] In February 2016, it was announced that Channel 5 had ordered a new comedy series.