Episode 7 of Adrift follows the Robertson family as 34 days adrift expose deep marital fractures between Dougal and Lynne, who erupt in years of pent-up resentment. The castaways face extreme dehydration after a water bag is lost, prompting Lynne to administer a makeshift enema to rehydrate the group. Dougal’s determination peaks when he and his son catch a shark, only for the severed head to bite Douglas, marking a turning point in their survival. The episode ends with Douglas expressing suicidal despair as the family teeters on the brink of death.