The Secret World of Lego (Channel 4/HD | 8:00pm to 9:00pm | Sunday 14th June 2015)

In 2013 Lego became the most profitable toy maker in the world. Now this notoriously secretive, privately-owned superbrand is opening its doors. This documentary reveals what makes Lego tick, meeting some of its key people and revealing more about the company DNA than ever before. The Secret World of Lego follows Justin, a 23-year-old design student, as he travels to Lego headquarters in Denmark in pursuit of one of the most hotly contested jobs in the world, as a Lego set designer. The programme also meets Liverpudlian Matthew, who undertook the same process and has now risen to become a Vice President of Design; and Mark and Tom, two adult fans of Lego, as they try two different money-making schemes they hope will transform their love of the brick into cash. And there’s Roar, the Lego ‘reputation manager’, who guides viewers through this secret world, until the programme gets a little too close for comfort.

The Met: Policing London (BBC 1/HD | 9:00pm to 10:00pm | Monday 15th June 2015)

Documentary following the officers of Britain’s biggest and busiest police service as they deal with life, death, crime and its victims, all across the capital. Mistaken identity leaves a young father dead and detectives struggling to catch his killers. Brixton CID hunt a violent sexual offender before he attacks again, and Notting Hill Carnival sees London’s biggest police operation.

Dogs: Their Secret Lives (Channel 4/HD | 8:00pm to 9:00pm | Thursday 18th June 2015)

One in four British homes has a dog. But our 21st-century world can be baffling for man’s best friend. Mark Evans and his team take on the cases of dogs struggling with the modern world, tackling some of the most outrageous, challenging and shocking examples of dog behaviour. In this episode specially shot surveillance footage shows how battling Alsatian sisters Tasha and Kes have forced their owners to partition their home and lead separate lives. Meanwhile, tiny Chihuahua Marley is a big nuisance as he marks his territory throughout his house, leaving a smelly trail and destroying furniture. Mark sets out to help these dogs, other dogs and all their owners enjoy happier, healthier lives. The team also investigate whether dogs can feel jealous or guilty, and trainer Tamsin Durston shows how to stop dogs jumping up.

Britain’s Busiest Airport – Heathrow (itv/HD | 9:00pm to 10:00pm | Thursday 18th June 2015)

Documentary series going behind the scenes at Britain’s biggest and busiest international airport – London Heathrow. The final episode focuses on Departures and the process of getting 100,000 passengers on board their flights on time every day. Dispatcher Callie and ramp manager Steve have a problem when a passenger disappears after checking in. In security, Sundeep and his team have to search an unusually dressed traveller and deal with a man who is unhappy about having his bag searched. Photographer Kate – one of the paparazzi – is on the lookout for celebrities. Meanwhile, Heathrow’s extradition team ensure that police suspects are put on departing flights.

All TV guide information taken from DigiGuide — www.getdigiguide.tv/?p=1&r=15119.