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.