Single contestants must team up with a stranger of the opposite sex for a chance to win $50,000. First, one team member wearing weighted shackles is submerged in water with a 30-second air supply, and their partner must dive in and remove the weights. Teams must then dine on disgusting picnic items, such as maggoty fried chicken and rotten squid lemonade; and the men must collect flags while being dragged under a moving train and hand them off to the women, who must then climb atop the train and place the flags. A family is challenged to retrieve keys by mouth from a box of scorpions in this week's Home Invasion.