The Amazing Race - Season 4 Episode 10

All teams complete the task and receive a clue to go to the airport and get to Seoul, South Korea, which is approximately 4,000 miles away. Despite a rule that requires the teams to leave for the airport in vans at one-hour intervals, the teams all end up together at the airport. There, they take a plane that heads to Singapore and then connects to Seoul. Once at Singapore, two teams, David and Jeff and Jon and Al find that a flight heading to Hong Kong will arrive in Seoul one hour earlier. They take this flight and form a sort of alliance, arriving in Seoul first. Once in Seoul, the teams find a clue that takes them to an icy area close to the South Korean border. This creates confusion, with David and Jeff getting lost and having a harrowing experience when their taxi driver takes them past where they should be and are surrounded by military vehicles.