ITV Heathrow: Britain's Busiest Airport Catch up on the ITV Hub Documentary series going behind the scenes at Britain's busiest and biggest international airport - London Heathrow. 4 episodes available to watch Share this programme: Share on Facebook Share on Twitter Share on Google+ Series 4 Latest Episode 4 Wed Wednesday 23 May 8pm The staff at Heathrow battle the elements when the Beast from the East arrives. Episode 3 Wed Wednesday 16 May 8pm There's trouble when a mobile crane enters a live airfield. Episode 2 Wed Wednesday 9 May 8.30pm Documentary series. Demi and Sue wrestle with a drunk in Terminal 2. Episode 1 Wed Wednesday 2 May 8pm Documentary series. Passenger experience manager Demi deals with disgruntled passengers.