James receives a letter he never expected while Team Blue is excited to head into Manhattan. Today's challenge is the toughest one yet. Jo, Justin, and Ashlee all meet new sisters. Abe and Eric race to a Manhattan rooftop to meet Eric's cousin.

On the final day of Relative Race, each team is looking to secure the grand prize. Team Red has renewed strength after finding out they made it to Day 10. After a series of medieval-themed challenges, Dan reveals the winner of Season 13.