The fourth leg of The Amazing Race Asia season 5 starts with the teams making a race to Phuket, Thailand. While the other teams head off to Phang Nga Elephant Park for their Route Marker, Rach & Vicky have to perform their Speed Bump as they avoided elimination in the last episode.
In Speed Bump, Rach & Vicky must make their way to Wat Tham Phung Chang Temple. Inside the Elephant Belly Cave, Rach & Vicky must find an elephant statuette in order to continue their race.
In Phang Nga Elephant Park, teams must prepare the elephants' favorite treat: a large pile of pineapple stock. Once they have gathered enough, teams will get to ride the elephant from the river to their feeding area before receiving clues to their next destination. Treasuri & Louisa, Parul & Maggie and Tom & Anita complete their tasks with almost no difficulties as they make their way to Sarasin Bridge for clues to their Detour challenge.
For their Detour challenge, teams must choose between "Muay Thai" and "Un-tie". In "Muay Tie", both team members must master and then successfully perform an old-school Wai Kru routine under the watchful and extremely strict eye of their trainer. In "Un-tie", teams must untie a pontoon raft tied to the shoreline with hundreds of complicated knots. Once they have freed the raft, they must pull themselves across to the floating fishing village in order to retrieve their clue.
Treasuri & Louisa, Yvonne & Chloe, Tom & Anita and Eric & Rona choose "Un-tie". Alex & Will, Parul & Maggie, JK & Mike and Rach & Vicky choose "Muay Thai".
With their puzzle-solving skills, Treasuri & Louisa quickly complete their Detour challenge, leaving the other teams lagging far behind. At "Muay Thai", teams are finding out that this challenge is not as easy as they thought, as they make repeated attempts at their performance.
Under pressure of "Muay Thai", Rach cannot keep up with the routine and breaks down in the middle of the challenge. Rach even contemplates giving up as she figures that there's no way they would not be last at this point.
Once teams finish their Detour Challenge, they must make their way to Mai Kao Temple for their Road Block challenge. In this Road Block challenge, one team member must be able to stay completely still for 15 minutes, while balancing coins on their hands and head. This Road Block proves to be extremely difficult as Louisa, Parul, Eric and Yvonne cry tears of relief after completing this challenge.
Louisa & Treasuri dash to the Pit Stop, making them the first team to arrive two times in a row. Tom & Anita follow closely behind; although happy that they are second, they are eager to beat Louisa & Treasuri. Yvonne & Chloe and Eric & Rona reach the Pit Stop but Eric & Rona set off in the wrong direction, giving Yvonne & Chloe third place, while they arrive fourth.
While Parul & Maggie make it to fifth place, Rach & Vicky are just finishing up with their Detour challenge. However, JK & Mike's taxi needs to be refueled, giving Rach & Vicky a chance to catch up. At the run to the Pit Stop, it was a close race but Alex & Will make it to sixth place, JK & Mike cutting it really close at seventh place and putting Rach & Vicky in last place.
It's a tearful elimination as Rach & Vicky say their goodbyes.
"Being eliminated makes us sad, but we are still together and remain as friends," Rach & Vicky said.