King of the passenger experience, manager Demi, deals with some disgruntled passengers, check-in girls Carrie-Anne and Selina juggle love lives and baggage belts, and border force Bob questions a young Brazilian student.

The airport runs at capacity, and the king and queen of Terminal Two, Sue and Demi, cope with the extra load from a closed Gatwick. Meanwhile, border force Bob is back, doing what he does best, protecting Britain's biggest border.

Border Force Bob juggles visas with a circus performer, whilst Security Officer Estefania investigates an oddly shaped object. There's also drama in Terminal 3 for Passenger Experience Manager Harry as he deals with a medical emergency.

Flying into Heathrow are an endangered parrot and a polar vortex. Whilst Officers Dave and Terry hunt for a wanted man gone missing on a plane, airside Ian and slicker-for-the-rules Steve battle snow in a blizzard to keep the runways open.

Dairy, drugs and dogs headline the visit to Heathrow. On the airfield, Airside Ian goes for a promotion, whilst inside the terminals Queen of T2 Sue saves a musician from missing her concert, wile there's a serious breach in security.

Landing at a hectic Heathrow is new Border Force Officer Rob, who is investigating job scams. Meanwhile, the grass is in desperate need of a trim, and we meet duo Sophie and Rachel, who are raving about airside safety.

Back with the colourful characters of Britain's Busiest Airport and it's as frenetic as ever. The runway is closed, Heathrow's Starsky and Hutch cordon off a plane full of passengers, and Airside Ian turns detective.

Passenger Experience Manager Demi deals with a medical emergency involving all the emergency services, Border Force Rob returns to cross-examine unsuspecting passengers arriving into the UK, and Buggy Driver Carlo is all loved up.

A five-star airline gives a top tier performance all about baggage. Plus, Border Force Rob deals with a frozen chicken trying to enter the country, and there's a surprise for passengers flying across to Heathrow's number one European destination.

An arresting episode greets viewers this time as Heathrow's boys in blue dash to the gate. Plus, Queen of Passenger Experience Sue sorts out some gents, whilst out on the airfield, Airside Ian shows off his muscles.

It's a right royal romp at Heathrow Airport with VIPs oozing out of every terminal. Passenger Experience Manager Sue gets star struck, whilst in Terminal Four, hockey champions try using their gold medals for an upgrade.

It's midnight. Airside Ian checks Heathrow's airfield lights before the onslaught of half term. Drugs Dog Cole protects the Border, while officer Estefania pushes passengers through security with a unique handling method.

Heathrow's heroes deal with the UK's worst winter storms. Whilst winds rage out on the airfield, and safety officer Rachel with airside Ian go into battle with bins and royal birds, inside the terminal there's a bad smell in immigration.

Border Force Kat decides whether to allow a holiday-maker arriving with little money and a confusing story into the UK. Meanwhile in Terminal 3, meticulous Customer Service Agent Mr Sho is having issues with a 400-year-old Japanese tradition.

In the coloured lanes of customs and excise, we rummage through carry-on luggage on the lookout for secret stashes. Virgin Atlantic's punctuality record is put in jeopardy by a captain's bottle of water, and there is love, actually in the air.

It's all upgrades and upper class at Heathrow as Virgin's clubhouse manager Holly showers passengers with her VIP treatment Valentine-style, while officers Terry and Dave have to deal with an unhappy upgraded passenger.

At Britain's busiest border, officers Kat and Tracy help a student from India who's arrived with no fixed abode, while on the airfield, Airside Ian is ducking and diving on the runway. Terminal 4 welcomes an exuberant new ambassador.

At Heathrow's Terminal Four, new airline on the block Vietnam Airlines are battling baggage woes in the lead up to the holiday period. Rookie engineer Mo comes up with an ingenious solution to ensure no-one is stranded abroad without their luggage.

It's all smells at Heathrow's Terminal 3 with a new restaurant, and Border Force dog Jessie sniffing out thousands of pounds. Meanwhile, Airside Ian is ramping up his crow impersonations, and Demi prevents a cardiologist having a heart attack.

Answering the question of whether you could pick up someone else's boarding card and take a trip around the world. Plus, some plane-spotters await a rather rare sight.

There's something smelly in Cargo that Border Force have to get to the bottom of. Passenger Experience Manager Harry rushes to a gate that's had its door smashed in and King of Terminal 2 Demi has 700 passengers descend on him - one being a pop star.

With only one runway and two terminals open, Heathrow's depleted staff are fighting to keep business going. At the helm is King of Customer Service Demi, dishing out help to all those allowed to travel, including tracking down a missing passenger.

Flying for the last time out of Heathrow is the iconic Boeing 747, with plane spotters around the world hoping to bid it a fond farewell. Inside the terminal, it's hello to some new rather robotic members of staff.

Christmas is approaching and there's a new kid on the block: British airline, Domestic Carrier Eastern Airways. They're excited to be joining the big names at Heathrow, but one of their busiest flights is scuppered by yet more bad news.

Spring is about to be sprung and Heathrow is readying itself for a flurry of passengers as it's announced that holiday makers can travel to 12 new countries.