We're still in Argentina as Rachel & Dave depart first, being instructed to drive to Cafayate Town Square where a mounted postman will deliver their next clue. They know they have a target on their back but are comforted by the security of the Express Pass - although they vow not to use it unless absolutely necessary.
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As it turns out, their lead means absolutely nothing when they discover the postman won't arrive until sunrise, giving the rest of the teams time to catch up with them. That gives us enough time to learn federal agents Nary & Jamie are continuing to tell the other teams they are kindergarten teachers, and clown Dave has beaten LP Hodgkin's Disease twice. "If we can beat cancer twice I'm pretty sure we can win the race," says Cherie.
Once the postman arrives our teams are faced with a detour: boil my water or light my fire. The former task involves constructing a solar kitchen and using it to boil a kettle of water, while the latter requires teams to gather clay and firewood and use a donkey to transport the goods one mile to a pottery workshop.
Art & JJ are the only team to opt for the fire challenge and it seems that being unique hasn't paid off when they struggle to locate the detour location, which appears to be further up the road than the solar kitchen locations where the other teams have gathered. "I can't believe we fell this far behind," they lament. "We are so much smarter than that."
Back at the solar kitchens, Dave & Rachel are struggling to construct their kitchen, so they decide to take a peak at another team's progress. They discover they've missed a vital part of the task - the instructions to constructing the kitchen are actually on the side of the box. In quite clear view. Oops. They get back to work.
Bopper and Mark - aka Team Kentucky - are the first to complete the detour, which is the good news. The bad news is the next clue tells them to take an EIGHTEEN HOUR bus journey to Buenos Aires.
Perhaps surprisingly given their shaky start, Art & JJ are second to finish. Gradually, the rest of the teams begin to finish leaving federal agents Nary & Jamie in last place after they apparently have to wait 45 minutes for their water to boil.
Finishing first has its advantages as the leading teams grab an earlier bus, although, as they say, on an 18-hour bus ride anything can happen. The other teams are scattered among two other buses.
You'd think the third bus would arrive last… but Bus Number Two has a malfunction on the road when the back window shatters. Poor Joey & Danny, Ralph & Vanessa, Dave & Cherie and Andy & Elliot therefore fall behind.
It's worth noting that Kerri & Stacy and Nary & Jamie, who are on Bus Number Three, have no idea they have been bumped up the standings when they arrive in Buenos Aires. They actually only find out at the pitstop.
Waiting for the teams in Buenos Aires is a cattle counting task. Teams have to calculate the number of cattle and the average weight per head at a busy, noisy cattle auction.
Rachel & Dave are first to arrive, with Rachel taking on the challenge. It actually seems quite tricky as the auctioneer is yelling out numbers at fast speed, so she and JJ team up to find the answer faster. Mark steps up for Team Kentucky - and it turns out he once worked at a cattle market so this should be easy for him. It's less simple for Big Brother's Rachel. "I don't know anything about cows except that they taste good in steak," she laments.
Teamwork pays off for Rachel and JJ when they secure the pitstop clue - they have to get a taxi to the El Gomero, a 200-year-old rubber tree. They zoom off leaving a struggling BB Rachel behind ("I'm really bad at maths!") but JJ has no sympathy. He says he'll help army officer Dave but not "tag along" Team BB.
In the end, Rachel gets the answer by herself, but there's drama for Team Big Brother when they can't find a taxi. Rachel ends up in tears because of the pressure, leaving Brendon to comfort her on the side of the road.
Rachel & Dave and Art & JJ have already checked in at the pitstop by the time the third bus arrives in Buenos Aires, giving an idea of how far in front the leading teams are.
Unfortunately for Dave & Cherie, they fall into last place at the cattle challenge when Dave struggles with the math of calculating the average weight per head. They are the last team to arrive at the pitstop (wearing giant red noses) and are eliminated from the race. They remain thankful for the opportunity and having each other. "We're the luckiest couple on earth," says Dave, as they cartwheel - literally - away from the race.
Leg Two Pitstop Standings
1. Rachel & Dave - won a trip to Grenada
2. Art & JJ
3. Bopper & Mark
4. Brendon & Rachel
5. Kerri & Stacy
6. Nary & Jamie
7. Vanessa & Ralph
8. Joey & Danny
9. Andy & Elliot
10. Dave & Cherie - eliminated
The Amazing Race airs Sundays at 8/7c on CBS