Last Tango in Buenos Aires

'''The four remaining teams head for Argentina to partake in a challenge filled with tango and rodeo. One team continues their nefarious ways in messing with another team in order to continue their winning ways, while one's continued attempt to be less aggressive is furthered along with another's encouragement. After going through too many trials of their own, someone finally confesses their love for another, but the final race to the finish leads to a problem caused by another to throw them off a mountain; forcing new lovers out of the race but bringing back two others in their place.'''

Plot
The final four teams receive their next tips and head for their next destination: Buenos Aires, Argentina. Devin is convinced that nothing will go wrong, causing Carrie to worry. At the airport, Kitty manages to convince the ticket holder to book The Ice Dancers and the Cadets in the seats next to the restrooms, and the two teams swear revenge on the Sisters. Devin again tries to confess to Carrie about his feelings, only to stumble once again.

Once in Buenos Aries, the teams face an All-In where they must perform the tango for at a local dance academy to receive their tip before taking a cab to a ranch. Jacques and Josee easily complete the challenge due to being dancers and take the lead. Sanders and MacArthur are too aggressive with their dance and fail. Devin has taken tango lessons with Shelley, and is confident he will be able to profess his love for Carrie, but ends up injuring her during their dance. Emma and Kitty are the second team to finish and head for the Don Box.

The next challenge is a Botch or Watch where one team member must ride a horse and use a boleadora to tie up their team’s emu and take it to the Chill Zone on Mt. Aconcagua. Jacques tries to sabotage the sisters by coating their emu with vegetable oil, but ends up spilling it on himself. Meanwhile, back at the academy, the cadets finish their tango, leaving the best friends to fall behind. Carrie becomes upset at Devin for repeatedly injuring her and takes charge, allowing them to complete the dance. At the ranch, both Kitty and Jacques struggle during the challenge due to the oil. MacArthur’s horse refuses to move after she keeps yelling at it. Sanders comes over and calmly soothes it, putting the cadets in the challenge.

Kitty becomes frustrated after her boldeadora keeps slipping off and tackles the emu, sending both down the mountain (though she snaps a selfie), followed by Emma, who was concerned about her sister. Jacques gets the oil off his hands by rubbing it in his hair, allowing him to tie his emu. MacArthur manages to capture her emu next, and the two teams race for the Chill Zone. In a close footrace, the Ice Dancers manage to beat out the Cadets for first, to Don’s amazement.

The Best Friends are the last at the ranch. Devin manages to snag his emu, but notices they are the only ones there. Carrie gives up hope, but Devin finally tells Carrie that he’s in love with her. The two embrace and have their first kiss, before noticing the sisters heading up the mountain. Realizing they are still in the race, they head for the Chill Zone. In order to catch up with them, Kitty ties herself to the emu.

In another close footrace to the Chill Zone, Carrie and Devin barely manage to beat the sisters and take third. However Kitty, unable to steer the emu, crashes into Devin, sending him over the cliff’s edge. Kitty is wracked with guilt, but Emma assures her it was a non-elimination round, meaning the sisters are still in the Race.

Devin is too injured to continue and is evacuated by helicopter in a body cast. Before the Best Friends depart, Don tells them they must choose one team to return to the competition. Carrie chooses the Surfer Dudes, as they sacrificed themselves for them back in Vietnam. The producers call Brody and Geoff, who are hanging at the beach, and have them come back.

As the Best Friends leave via helicopter, Carrie remises over the good times they had during the Race and professes her love for Devin. However she hears a muffled Devin say “Shelley” and tells him to stop talking.

Cast

 * Brody and Geoff appeared; however, had no dialogue.
 * The paramedic who takes Devin away speaks; however, it's unknown who voiced him.

General

 * This episode was supposed to be a non-elimination leg but since Devin sustained major injuries, they were removed from the Race.
 * As of this episode, every team from the original final five was saved by a non-elimination round at least once.

Continuity

 * The Rob Ford look-alike from None Down, Eighteen to Go - Part 1 appears a passenger walking out of the lavatory.

Goofs

 * The cast of Sanders' left arm disappears a few times in the episode. It disappears when the contestants first arrive in the tango academy, and later when the Police Cadets finish the challenge and run out of the studio.
 * The Argentinian birds are incorrectly referred to as emus. They are actually called rheas, which are closely related, but still distinct from emus which are native to Australia.
 * In several instances of the episode Buenos Aires is shown to be situated by the Andes. In reality, the city is located in a geographic area known as the Pampas.
 * When the helicopter is flying away, only Josee's hair seems to blow while the other contestants' hair remains still.