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.
Jo has a surprise birthday party! Day 7's challenge is out of this world. Abe meets his first relative from his mother's side of the family. Jo and Justin both find new siblings. Ashlee and Brennan meet cousins who share home videos.
Teams Green and Black get freaked out at the challenge. Justin finds a first cousin and Ashlee discovers a niece. Eric has multiple life-changing moments, including learning his father's name.
The halfway point finds Team Blue with a crucial advantage over the other teams. Justin finds a close relative, Ashlee finds more information about her mother, and both Jo and Eric find siblings.
Teams Green and Red work to communicate better. All teams play chicken with a new set of challenges. Ashlee (Team Black) and Jo (Team Green) meet family members that have been waiting for them their whole lives.
Team Green gives the other teams a penalty as Team Red struggles to stay in the race. Team Black meets an extra special relative. Jo (Team Green) meets her grandfather and Justin (Team Red) meets his sister who gives him disappointing news.
Contestants race across the country in search of relatives they have never met, in hopes they will reach the finish line first and win the grand prize. Four teams (red, blue, green, black) are given clues and challenges along the way that lead them to people who share the same DNA. The last-place finisher at each stage of the competition receives a strike. Three strikes and that team is out.