OUR pick of the best of tonight's telly...

Long Lost Family (ITV, 9.30pm)

The World Cup may have been something of an emotional rollercoaster, but there's no let up for viewers even now it's over as one of the most moving shows on the box returns for a new series.

But what is it about Long Lost Family that draws people in? Nicky Campbell, who co-hosts the series with Davina McCall, thinks he has the answer. He told the Daily Record: "It's about the human heart. It's about who we are, what we are, what we yearn for and what we need, as emotional beings. It's about love and loss and fulfilment and redemption."

The broadcaster, who was himself adopted, also thinks that Long Lost Family offers a fascinating insight into how much the process has changed.

He says: "In the past adoption could at times be a brutal business. You were given away, taken away, given a brand new identity, not told anything. I think it's sociologically quite interesting, when we see how much society has changed and our understanding has changed... It reminds us how much better things are, in so many ways."

Hopefully, there will some more uplifting moments in this new run, which begins by introducing viewers to Pearse Egan, who grew up in Ireland with his single mother Ann.

His mum had met his dad, Eddie, while they were both working at a New York nightclub, but after discovering she was pregnant, she opted to return to Dublin.

Pearse has only spoken to his father once, shortly after receiving a sixth birthday card from him. Here, Pearse recalls that the call took place in a phone box but was cut short when he became upset. He lost all contact with Eddie after that.

As he's grown older, Pearse has wanted to find his father, prompting Ann to launch a search of her own. However, when she called the New York nightclub where they used to work, the staff told her Eddie was no longer there - they'd heard he'd been ill and may have moved to Las Vegas.

That news left Pearse fearing it may already be too late to track down his father, but can the Long Lost Family team pick up where Ann left off and locate him?

The second search involves Christina Barlow, who was born in Bogota, Colombia, but raised in Berkshire after she was adopted by an English couple.

Christina knows from her adoption papers that her birth mother, Encarnacion, was living in extreme poverty with three other children, but there is no mention of her father.

Encarnacion gave her daughter up in the hope she would have a better life, and now Christina wants to find her and thank her for the sacrifice she made. She's hoping that the Long Lost Family team can make that possible and also help her to find out more about her father, who has always been a mystery.

Have your tissues at the ready, because it's going to be emotional.

Inside the Factory (BBC2, 8pm)

For millions of us, getting through the day without a coffee or three is an unthinkable prospect, but what goes into making the stuff? In the first of a new run, Gregg Wallace explores an enormous Derbyshire coffee factory, where they produce 175,000 jars a day. He follows the production of freeze-dried instant coffee, from the arrival of 27 tonnes of Brazilian green coffee beans right through to dispatch. Meanwhile, Cherry Healey learns about the drink's chemistry and Ruth Goodman investigates its origins, visiting the site of the UK's first coffee house which sprang up in a London churchyard in 1652.

Mark Kermode's Secrets of Cinema (BBC4, 9pm)

The film critic's new series finds him taking a closer look at the techniques and conventions behind some of cinema's most popular genres, including heist movies, coming-of-age stories, science fiction and horror. But he starts with a type of film that some movie snobs can be a little sniffy about - the romantic comedy. Kermode charts the evolution of the rom-com, from screwball classics like Bringing Up Baby and The Lady Eve to more recent successes such as The Big Sick and La La Land, and finds out what it takes to make us swoon and laugh at the same time.

Inside Facebook: Secrets of the Social Network (C4, 9pm)

It's a sobering thought, but for a generation of kids born in the last decade or more, they will never have known a time when people didn't spend hours clicking on animated GIFs posted by their friends, or spend hours more pressing 'Like". Facebook is, of course, a phenomenon which has changed the way we get our news and snoop on our nearest and dearest. But who decides what can and cannot be posted on the world's biggest social media site? Here's a chance to find out in an investigation which looks at how those decisions are made. It also explores the impact that they have on the millions of people who use Facebook. After watching this, you may never look at that hugely addictive social media site in the same way again.