Four teams' journey of a lifetime starts in North Carolina. But before the race begins, one team receives some shocking news.

The photo subject for the day spurs intense competition and strikes a personal chord for Scott and Hannah (Team Green). Jamie and Jansen (Team Black) discover that their long-lost family are closer than they imagined.

Shawn and Curtis (Team Blue) are shocked to learn Shawn's father is still alive. Jamie (Team Black) finds someone he’s been searching his entire life for. A photo saves a team from a strike.

Day 4 starts with big surprises for Teams Red, Blue and Black. Team Red picks up a unique passenger while Team Green reflects on how blessed they are. Alex meets his closest relative yet and the Photo Challenge proves to be the difference.

Alex celebrates his sister’s birthday with a heartfelt song. Teams Red, Green and Blue all find close connections waiting for them. Jamie from Team Black has a life-changing discovery.

The morning starts with a surprise relative for Alex. Team Photos are filled with patriotic pride while all the teams get excited for their challenge.

Immunity is on the line and the teams push themselves to the limit. Jaime from Team Red has perhaps his most important family member waiting for him back at home in Brooklyn.

Team Red gets caught up in NYC freeway traffic so they resort to surface streets to save them from a fatal strike. Team Black gets surprised with a family reunion.

The three remaining teams face extreme weather in upstate New York as they face the waters of Lake George. A surprising twist adds an additional member to each team for the final showdown.