. "Season 21" . . . "21st season of ''The Amazing Race''" . . . . . . . "The Twenty-First Season" . . . . . . "The Amazing Race 21" . . . . . "21st season" . . . "21st installment" . . . "twenty-first" . . . . . . . "the Amazing Race 21" . . . . . . . . . . "21st American season" . . . "21" . "The Amazing Race 21" . "season 21" . . "Season 21, Fall 2012" . "2012-09-30" . . . "11" . . "Amazing Race" .