The Amazing Race 21 is the twenty-first installment of the American reality television show The Amazing Race. It featured eleven teams of two competing in a race around the world. It premiered on CBS on September 30, 2012, and the two-hour season finale aired on December 9, 2012. While the prize for winning the season remained at US$1 million, if the team that came in first in the first leg had also won the race, the prize would have been doubled to US$2 million.