Poppy and Georgie investigate the American system of law and order, joining the police in a sleepy Louisiana town, learning that not all dogs are cute and cuddly, and that hosting doesn’t always mean being polite to your guests. The Carlton’s also travel to the very end of the country to meet the Border Angels, who offer help to migrants on their way into the United States. Questions are put to YouTube superstar and ‘crime expert’ Jimmy Tatro, which leads to confusion, rather than clarity.

• Gemma Whelan
• Ed Gamble
• Amy Hoggart