By Paul Adams
Lucy Williamson goes on patrol with the police tasked with controlling migration across the English Channel, and meets the migrants who are determined to outwit them.
By Lucy Williamson
Rising temperatures and desertification are forcing many Mauritanians to leave their ancestral homes in search of a better life.
By Sinead Wilson
Reggie Yates visits the Middle East to spend a week living and sleeping in the largest refugee camp in Iraq alongside 30,000 Syrian refugees.
Former soldiers and police are among Afghans trying to evade a crackdown at the Turkey-Iran border.
It started with a 999 call from a lorry driver in Essex and ended in one of the UK’s biggest ever police investigations, a hunt for those responsible for the deaths of 39 Vietnamese migrants.
Film maker Julien Goudichaud follows young migrants as they go to extreme lengths to try to reach the UK.
By Bernd Debusmann Jr
BBC News, Washington
By Will Grant
BBC News, Mexicali, Mexico