''Between the Lines'' was a PoliceProcedural shown by Creator/TheBBC in 1992-1994. It was created by writer J C Wilsher and Executive Producer Tony Garnett. Almost uniquely among TV police series, it was a sympathetic depiction of the Complaints Investigation Bureau, the [[UsefulNotes/ScotlandYard Metropolitan Police's]] InternalAffairs section, accepting the necessity for investigation into police corruption and brutality while retaining some cynicism about the motivation and effectiveness of it.

The first of the three seasons began with the central character Chief Inspector Tony Clark being press-ganged into CIB as part of an investigation into corruption at the police station where he was based, and meeting his subordinates Mo Connell and Harry Naylor and boss John Deakin. A series of MysteryOfTheWeek episodes also have elements dealing with a StoryArc involving a gangland murder that exposes large-scale corruption. A number of high-ranking officers are suspected but it turns out that the main BigBad is in fact [[spoiler: Deakin himself]].

The second series shows Clark's and Naylor's careers both running into trouble as they investigate a series of loosely-linked cases that share the theme of the dubious overlap between the police and more secretive and sinister state security services. It ends with Clark and Naylor both sacked by the police and unwillingly joining up again with Deakin, who is now working as a private detective.

The final series, subsequently lamented by executive producer Tony Garnett as an example of FranchiseZombie-ism, made a GenreShift into political thriller territory, and ended with Clark and Naylor apparently being killed in an explosion while trying to stop an arms deal between [[UsefulNotes/TheTroubles Ulster Loyalist paramilitaries]] and [[ThoseWackyNazis European neo-Nazi extremists]].

The show won the 1994 [=BAFTA=] award for Best Drama Series.

See also the show's 2010s SpiritualSuccessor, ''Series/LineOfDuty''.

(For the webcomic about transgender teens, see ''Webcomic/BetweenTheLines''. For the BlackComedy newspaper strip, see ''ComicStrip/BetweenTheLines''.)

!!This show provides examples of:
* BiTheWay: Mo, rather oddly. She's heavily implied in the first season as an exclusive lesbian, then at the beginning of the second season she's dating a man with no acknowledgement of her first season sexuality and her shift to another woman as a partner is played almost like a coming-out story.
* BlackAndGreyMorality: Pretty heavily.
* BrokenPedestal
* TheCasanova: Clark
* DomesticAbuser: A memorable episode in the second season has a cop who murders his wife and uses his knowledge of the law and police procedure to get away with a manslaughter charge.
* DownerEnding: Many of the individual episodes in the second and third seasons, and the show as a whole.
* DrivenToSuicide
* FairCop: Jenny Dean in the first season, and Clark himself became famously popular with the female viewers.
* HeKnowsTooMuch: [[spoiler: Jenny Dean]]
* InnocentSwearing: In a possibly-unintentional moment of humour, at one point a bad guy collides with a group of schoolchildren, one of whom is clearly heard to shout "You dirty bastard".
* InternalAffairs: The whole point of the show is to present Internal Affairs' side of the story, in contrast to the loathing and contempt with which even relatively morally ambiguous cop shows usually portray them.
* IntrepidReporter: Deconstructed. In the first season Clark meets and has an affair with one of these, only for her to stab him in the back to get a story.
* LesbianCop: Mo
* OldFashionedCopper: Harry. Many episodes suggest that if he wasn't in CIB he'd be [[NotSoDifferent on the other end of an investigation]].
* PoliceBrutality: A common subject of the episodes, with an attempt to understand why it sometimes happens without condoning it.
* RippedFromTheHeadlines: Many of the cases-of-the-week. Also the subplot about Mo dating a woman senior police officer was heavily influenced by the much-reported real life case of a [[https://en.wikipedia.org/wiki/Alison_Halford woman senior police officer]] who sued her force for sex discrimination and was falsely rumoured (probably a deliberate smear by her enemies) to be gay.
* ShootHimHeHasAWallet: One of the first season episodes involves an investigation into a bad shooting where an electric drill was mistaken for a pistol.
* SmugSnake: Clarke's rival Inspector Graves.