The Amazing Race Season 18 Episode 1 - Head Down and Hold On

The Amazing Race 18 is the first season of U.S. television to be broadcast in high definition. While most other TV shows in prime time made the transition to high definition, including other reality shows, previous seasons, The Amazing Race have used the standard definition television, due to cost and the fragility of HD recording. International versions of The Amazing Race, the fourth in Asia and Latin America's second season, have already made the transition to high definition.