TRIGGER POINT

After a dip into the archives for Dolly Parton at the BBC, there’s another chance to see the documentaries Here I Am and 50 Years at the Opry, as well as her 2014 Glastonbury performance.

Sunday (STV, 9pm)

Last year, the series six finale of Line of Duty was watched by a staggering 12.8 million viewers, making it the most watched episode of any drama (not counting soaps) since 2002.

It was the brainchild of Jed Mercurio, and ITV bosses will be hoping this gripping six-parter, which he produced, will be equally well received.

It reunites Mercurio with Line of Duty star Vicky McClure and turns the spotlight on the work of the Metropolitan Police bomb disposal squad. McClure plays Lana Washington and Adrian Lester is her colleague Joel Nutkins. Both are experienced bomb disposal operatives, known as ‘expos’, who are called out to a London housing estate to investigate a potential bomb factory. There is no sign of the bomb maker, Andy Phelan, but his keys are missing, leading to a race against time to find him and his vehicle.

While Washington and Nutkins successfully defuse an improvised explosive device, its complexity suggests they are dealing with sophisticated terrorists...

For McClure, collaborating with Mercurio again was a no-brainer. “I’ll take any opportunity to work with Jed, not only because he’s a friend, but also because he’s incredible at what he does,” she says.

“I knew it was going to be a fun, interesting and intriguing job. It’s dynamic, it’s action-packed, it’s full of brilliant characters and it will put you on the edge of your seat waiting for the next explosive situation.”