Line of Duty continues tonight (Sunday 28 March) with the second episode of series six - so make sure you have this acronyms guide at the ready.
AC-12 made their much-anticipated return last weekend, with fans desperately scrabbling to refamiliarize themselves with the plot.
But keeping abreast of what is going on is made more difficult by the sheer volume of acronyms used in the show.
A lot of these, such as as police rankings, are the same as those used by real-world UK police forces, while others exist only in the land of LOD (that stands for Line of Duty, btw [by the way]).
Advert
To help you keep up to speed with the drama, here is a guide to some of the frequently used acronyms and codewords in the show:
CHIS - Covert Human Intelligence Source
MIT - Murder Investigation Team
PNC - Police National Computer
Advert
TA - Tactical Advisor
AC-12 - Anti-Corruption Unit 12
ARU - Armed Response Unit
CPS - Crown Prosecution Service
Advert
DIR - Digital Interview Recorder
DPS - Directorate of Professional Standards
IRV - Incident Response Vehicle
MoPI - Management of Police Information
Advert
OCG - Organised Crime Group
PR - Police Regulations
RUC - Royal Ulster Constabulary
RTC - Road Traffic Collision
Advert
SCG - Serious Crime Group
Sitrep - Situation Report
Fahrenheit - shoot to kill command
Status zero - radio code, officer needs immediate assistance
Status five - radio code, en route to incident scene
Status six - radio code, on scene
Ten eight - radio code, in service
DC - Detective Constable
DS - Detective Sergeant
DI - Detective Inspector
DCI - Detective Chief Inspector
Det Supt - Detective Superintendent
DCS - Detective Chief Superintendent
ACC - Assistant Chief Constable
DCC - Detective Chief Constable
CC - Chief Constable
TFC - Tactical Firearms Commander
AFO - Authorised Firearms Officer
SFC - Strategic Firearms Commander
CSE - Crime Scene Examiner
FI - Forensic Investigator
FLO - Family Liaison Officer
FME - Forensics Medical Examiner
PCSO - Police Community Support Officer
SIO - Senior Investigating Officer
UCO - Undercover Officer
So hopefully that helps. No doubt there'll be some inexplicable FRIM or TNRO referenced throughout tonight's episode.
It sure is a hell of a lot for viewers to keep up with; even cast members struggle with it.
According to the Radio Times, Kelly Macdonald, who has joined the cast as DCI Jo Davidson, said: "There would be certain acronyms that we would discuss at the time.
"In hair and makeup, they had a list pinned up, which was quite helpful, I found, of all the acronyms and what everything stood for. I'm not brilliant at [remembering them], but I sort of get by."
We feel you, Kelly.
Featured Image Credit: BBCTopics: TV and Film, Line of Duty