This had been hinted at in promotional materials aired before the Race began, where CBS revealed that one team made "an unprecedented mistake that ultimately prohibit[ed] them from joining their fellow Racers at the finish line." In a post-race interview, Dallas revealed that the loss of the passport and money was partly caused by the changing of a microphone battery by production. Andrew Lappitt and Daniel "Dan" Honig (of Andrew & Dan) stated in a post-race interview that the second U-Turn was available on Leg 9 but it was not used by any teams, thus it was not aired in the show.This was the first season in which racers did not use an available U-Turn (a race feature introduced in the previous season).This included the series' first visits to Bolivia, Cambodia and Kazakhstan, and return visits to Brazil, New Zealand, India, and Russia, with the finish line in Portland, Oregon.CBS had originally planned to only air one installment of The Amazing Race (season 12) in the 2007–08 season, but due to the 2007–2008 Writers Guild of America strike, CBS ordered a 13th installment as a replacement for programs affected by the strike.This is the only cast after the first All-Stars edition that was not represented in The Amazing Race: Unfinished Business or the second All-Stars edition.Winner Emily "Starr" Spangler was a Dallas Cowboys cheerleader prior to the race, The following teams participated in the season, each listed along with their placements in each leg and relationships as identified by the program.
At the top, teams were asked a mystery question- "How many stairs have you climbed?
Only three teams were permitted on a net at the same time.