Millions of people are expected to tune into the final episode of Heathrow: Britain’s Busiest Airport on Monday (June 13).

The first two parts in the new series drew 3.7 million viewers each to ITV with episode two featuring 70 jet-lagged Alpacas, British Airways’ new B787-9 Dreamliner and bird scaring.

It also covered one of American Airlines’ busiest days as passengers headed to the US for Thanksgiving; saw a two-year-old reunited with her family with the help of passenger service manager Sunita and cycle paramedics treated a pregnant passenger.

In the first episode highlights included the work of security officers and animal handlers at the Heathrow Animal Reception Centre.

Watch highlights from Series 2, Ep 1

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The final of the three-part special will reveal more of what goes on behind the scenes at Heathrow Airport including more incidents attended to by the passenger experience managers, as well as animal health officers and operational ground staff from British Airways.

There will be a chance to meet one of the first passenger experience manager’s Sue Hester who has worked at Heathrow for 22 years.

She has helped with the opening of both Terminal 2 and 5, met Tom Jones who she now sees regularly when he passes through the airport, and both her sister and brother work at the airport.

Ms Hester from Ashford said: “It is great fun working at Heathrow with lots of surprises and emotions. I like dealing with all the different people in different situations, meaning no two days are the same.”

Viewers will have a chance to get onboard with engineering technician John Welford another long-serving employee of 16 years who lives in Slough.

Mr Welford who has two children and a dog, said: “My job has such variety and takes me all over the airport. We probably cover more areas and assets than any other section.

“I love working with the rest of the team and we manage to have a good laugh most of the time. If you don’t have a sense of humour you won’t last long in water services.”

Elliott Fricker, an engineering apprentice, with John Welford, an Engineering Technician, both to star in final episode of Britain's Busiest Airport

Staying on the ground and in one of the most vital roles to make sure aircraft depart on time will see audiences follow Phil Utting, a turn round manager (TRM) for British Airways .

During his 26 years at Heathrow he has worked in a variety of other roles from manning the ticket desks to customer service duty manager.

Mr Utting who once met Kurt Cobain, said: “I enjoy the job as all departures are different. As the manager at the aircraft side I am expected to have all the answers.

“People look up to the TRM for reassurance and guidance. I think I am very similar to a conductor at an orchestra, as without me at the aircraft side, things do not happen.

“I pull the strings and ensure all parties work within the timescale provided to depart or turn the aircraft on time and safely.”

Episode 3 will air on ITV on June 13 at 9pm.