Dave, Bushra and Chloe confront the aftermath of a brutal regime that claimed hundreds of thousands of lives in Raqqa. Jess, Nathan and Mathilda face a mix of conflict, climate change and famine in Mogadishu.

In Syria, the Brits come close to terrifying drone strikes and meet victims recovering in hospital. In Lebanon, where millions of Syrians have found refuge, the Brits witness the rising tensions as stretched resources fuel hostility.

The Brits divide into two camps. Some meet a people smuggler, then face the terror of a sea crossing as they depart from Lebanon for Italy. Meanwhile, the other Brits arrive on the Italian island of Lampedusa. The two groups reunite in the Alps.

After crossing the Alpine Mountain pass, the six Brits travel to Calais to meet refugees who are determined to make illegal dinghy crossings to the UK. In makeshift camps, the Brits meet adults and children who are living in terrible conditions.