Line Of Duty concluded with over 9 million viewers on BBC One.
The fifth series of the hit BBC drama concluded with a feature-length finale episode at 9PM on Sunday (May 5).
An average audience of 9.1 million viewers tuned in to the show, with a peak audience of 9.6 million.
It makes Line Of Duty the most watched show of the year so far with 2019's biggest rating to date.
The sixth series has already been commissioned with talks for a seventh also underway.
Ahead of the series finale, the BBC has revealed that the series' opener had become the most watched programme on British television this year with an audience of 13.2 million viewers, once catch up has been added.
Line Of Duty showrunner, Jed Mercurio, said of the numbers: “We're thrilled and flattered by the amazing response to this series of Line Of Duty. On behalf of the whole production, I want to thank our viewers for their fantastic loyalty, and World Productions and the BBC for their unstinting support."
Simon Heath, executive producer for World Productions, added: “It’s testament to Jed’s brilliant writing and the best cast on British TV that the audience for Line of Duty has grown bigger with every series. A huge thanks to the BBC who took a chance on a small show in Birmingham back in 2011 and to everyone who’s supported us since."
Elsewhere on BBC One on Sunday night, Countryfile and Antiques Roadshow both saw audiences of 5 million viewers.
On ITV in Sunday night's TV ratings, The Durrells continued with 3.4 million viewers while Victoria interested 2.5 million.
An on Channel 4, SAS Who Dares Wins' first celebrity special concluded with a million viewers in the 9PM hour.