The Channel: The World's Busiest Waterway

Ferry captain Mark and his crew try to keep desperate migrants off their ship. Meanwhile, can a TV advert aimed at British viewers change perceptions of Calais?

Ferry captain Mark steers his 35,000-tonne ship across the Channel with drunken passengers onboard. Cross-Channel swimmer Naomi attempts to navigate the maritime motorway in unforgiving conditions.

This episode has unprecedented behind-the-scenes access to the Channel Tunnel, meeting senior engineers responsible for keeping it running and truckers trying to avoid 20-mile traffic jams

This episode follows a multi-million pound electricity cable project, and meets fishermen facing pressure from EU quotas and new technology projects as they compete for access to the Channel's riches