Contestants from reality shows "The Amazing Race," "Big Brother" and "Survivor" compete.

Racers have a big decision to make when they face a surprise double U-turn in Laos.

Teams travel to Vietnam where they must master synchronized dancing, karaoke singing and fishing for prawns.

Enemies are made when one team steals another team's taxi in Ho Chi Minh, Vietnam.

Teams take a leap of faith when choosing which detour challenge to take; a split-second decision may make or break one team's chances.

Teams must drum up enough strength for an intense head-to-head battle before checking into the mat.

Teams travel to Switzerland where they free-fall over 400 feet into the Gletscherschlucht Glacier Gorge.

Teams take a bumpy ride in Split, Croatia, and try not to get tongue twisted reciting poetry while in motion.

The final five teams must transport eggs by bicycle in the Netherlands.

With $1 million on the line, the final four teams race through London and Detroit on the quest to cross the final finish line first.