In this first episode we meet Dame, who arrived in the UK over 17 months ago. "I am a ghost in a prison" is how he describes his experience of life as a refugee in London.

In a camp in Greece, Nazifa and Latif are trying to get enough money to pay a smuggler to take their family to Germany, but they can only afford to send one of them.

Shot over three years and in 31 countries, the multi-award winning Exodus series continues to document the journeys of migrants and refugees attempting to start a new life in Europe.

In 2015, we gave cameras to some of the people who smuggled themselves into Europe, to record where no-one else can go. The result is a terrifying, intimate, epic portrait of the migration crisis.

Twelve months ago, the production team began giving camera phones to people attempting to reach Europe, escaping war, poverty or persecution. They were prepared to film where regular film crews could not go: on the inflatable dinghies crossing from Turkey to Greece, in the back of lorries entering the Eurotunnel, or on open trucks driven by people smugglers across the Sahara.

Ahmad's journey continues in this second episode. A Syrian Kurd, he has reached Athens, and rather than take the long and uncertain over-land route through Europe, he negotiates with a smuggler for a fake passport that he can use to fly to France.

27-year-old Hassan, who survived the sinking of his dinghy in the Mediterranean, has reached Calais and the infamous Jungle. But every attempt to board a train or lorry is thwarted, and his spirits fall as he sees his friends succeed in crossing the Channel. In desperation he tries to fly to the UK on a fake Czech passport, but the final few miles prove the hardest to travel.

Unreported World reveals shocking evidence that Burmese refugees fleeing the country's brutal military regime are being detained and then allegedly sold by Malaysian immigration officials to Thai human traffickers.

In the jungles of North East Congo, the Unreported World team uncovers evidence that the Lord's Resistance Army - one of the world's most brutal rebel groups - has begun a new campaign of terror, and talks to survivors with stories of unimaginable horror.

Following the journey migrants take as they try to smuggle themselves into Europe poses a unique set of challenges. First, you need to find the migrants. This isn’t a simple task, as my director Jacob Waite and I soon discovered. Although hundreds of thousands enter the EU from the east via Turkey every year, these are people who have dedicated themselves to being invisible. They are breaking the law and risking their lives to slip unseen across borders.

In the Sinai desert, thousands of African immigrants fleeing conscription, torture and conflict in East Africa risk being shot by border guards and held ransom by people smugglers as they try to get to Israel. The director Paul Kittel and his reporter arrive in the Sinai desert in north-east Egypt just over a month after the revolution that toppled the regime of Hosni Mubarak. Smuggling from Egypt to Israel has gone on for years, but now the smugglers are focused on people rather than goods.

Unreported World visits Lebanon to reveal the plight of some of the most vulnerable refugees fleeing the war in Syria: disabled people, many of whom are children

Unreported World meets gay refugees who have fled to Germany from the Middle East but are still subject to violent attacks and abuse, from fellow refugees and migrants

In Lebanon, Syrian refugee children with serious medical conditions are suffering and dying while they wait for help that the international community offered them.

This dramatic, visceral and profoundly moving documentary joins three refugee children from the Middle East on their dangerous journeys to what they hope is a new future in Western Europe