The Heart of Country: How Nashville Became Music City USA (BBC4, 9pm)

TIME for a profile of Nashville, Tennessee and a look at some of the stars who have passed through the Dosey Doe studios here, from Hank Williams to Kacey Musgrave.

We look at relationship between commerce and art that has defined Nashville since 1925 and led to attempts to turn Willie Nelson into a matinee idol at one stage, and how a conservative, deeply-religious southern city transformed itself into the beating heart of country music.

Contributors include Dolly Parton, who is shown in her big-haired pomp alongside TV star Porter Wagoner, Willie Nelson, Brad Paisley and Steve Earle, who talk about seeking music success in a city that was ruled by record labels and DJs – most of whom had set ideas on what made that particular Nashville sound.

There's also archive footage of performances by Nashville legends including a gum-chewing Bob Dylan singing One Too Many Mornings with Johnny Cash, Loretta Lynn and Garth Brooks.

Lewis (ITV, 9pm)

ACTRESS Angela Griffin didn't think twice about signing up to star alongside North-East actor Kevin Whately and Laurence Fox in this eighth series, to play DS Lizzie Maddox.

The actress explains: "I'm really proud to be a part of it. It's quite a scary prospect going into something that's so popular, successful and established. The people who work on Lewis have worked on it for such a long time, which is really rare, and there's a real family feel to it. Everyone has been nothing but lovely, so welcoming and so nice."

She is no stranger to long-running dramas though, having starred in the likes of Waterloo Road, Cutting It and Holby City, and of course, she'll always be remembered for her role as hairdresser Fiona Middleton in Coronation Street.

Tonight, it's the penultimate episode of the series, the first of a two-part finale. We're taken back to 2001, when Lewis arrested Graham Lawrie (Alec Newman) for the brutal murder of three police officers. Lawrie was given a life sentence, and after being diagnosed with psychopathy was admitted to a secure psychiatric hospital.

But now, 13 years down the line, the prosecution's case is falling apart, after the forensics department that dealt with the DNA used to convict Lawrie has been called into question.

The accused is still locked up, now awaiting his day in court, but Lewis knows he got trouble when PC Mark Travis is lured to isolated location and struck over the head with a slater's hammer - the same murder weapon that was used 13 years ago.

As a number of suspects are considered, including spinster Pamela Carson, Lawrie's greatest defender, and journalist and Lawrie's ghost writer, Hugo Blayne, anyone of them could be the accused's accomplice.

Hathaway and Maddox investigate the murder of Travis, and soon discover that the trail leads back to Lewis' original case. Soon Lewis is feeling isolated, with his reputation now on the line.

Not Going Out (BBC1, 9.30pm)

LEE Mack returns as the lovable London-based layabout still attempting to win over Lucy (Sally Bretton). In the latest offering, Lucy attempts to befriend posh new neighbours Toby and Anna because they go to gallery openings and classy events.

"It's a totally different world up there," she sighs pondering their upstairs flat. Perhaps little wonder Lee compares her to The Little Mermaid.

Lucy might be desperate to impress, but when Lee comes back from the cinema early, she's clearly facing a losing battle, especially when her lies about closing a big deal become more elaborate, and he creates a culture clash with their guest over the teapot.