Eleven of the most memorable teams return for another Race around the world, but in a dramatic series first, one team will not make it to the starting line.

Mark and Mallory continue to struggle with communication and one major mistake jeopardizes their chances to keep racing.

Teams race through the Malaysian jungle where the roaring rapids crush their spirits and their homemade rafts. Plus, after being struck by taxi deja vu, one team fights to stay in the running.

One racer pours blood and tears into an exhausting Roadblock and another racer suffers a meltdown during an extremely difficult Detour.

The Race continues in Sri Lanka where teams struggle to get a bite when fishing for their next clue.

The teams are in Sri Lanka, where an exhausting Roadblock drains the racers of all their strength. Also, an epic race through the countryside ends with a footrace to the Pit Stop.

Teams race to Rome, Italy, where Racers and Roman gladiators square off in a medieval Detour. Plus, three teams strike a deal in order to try to avoid elimination.

The competition gets fierce as the remaining six teams face a double U-Turn, and the Cowboys contemplate a major decision.

With the final finish line getting closer, tension between two teams rises. Meanwhile, three teams make a final three alliance in hopes of making it to the final leg.

The Racers are in Spain where another double U-turn threatens the accidental alliance. Meanwhile, one team suffers a potentially game-changing injury.

The final four teams are in Liverpool, England, where they experience a once-in-a-lifetime shoot-out at the historic Anfield Stadium, home of the Liverpool FC. Meanwhile, one team misreads a clue and jeopardizes their chances at making the final three. Written by Anonymous

With the $1 million prize on the line, the final teams race through Las Vegas, where the world's greatest illusionist, David Copperfield, designs a final challenge that requires the remaining teams to master the art of illusion.

The best of the reality series crop is back, with 12 teams of 2 players each racing around the world, trying not to be eliminated at a series of checkpoints in which the last team to arrive is booted from the show. CBS chooses teams with relationships containing at least some tension, especially when the situation involves intense pressure. This season includes such duos as two circus clowns, a gay married couple, a father and son, a recently engaged couple, married couples, and best friends. Written by T.J. Magwire