The last four teams of "The Amazing Race" will head over to the Philippines to continue their journey for the remaining leg of season 25. 

In the episode titled "Smells Like Dirty Tube Socks" that will air on Friday, the remaining teams will leave Singapore for the Philippines to vie for the top three spots this season. 

The official synopsis for episode 10 reads: 

"The Amazing Race Season 25 Leg 10 will continue on in the Philippines from Leg 9's pit stop at The Fullerton Pavilion in Singapore. The 'TAR' 25 teams will do a familiar challenge involving mud and an ornery ox. It is a switchback challenge from 'The Amazing Race' Season 5." 

The last teams standing in the current season of "The Amazing Race" include: "Married Surfers" Bethany Hamilton and Adam Dirks from Princeville, Hawaii; "Dating Pro Wrestlers" Brooke Adams and Robbie E. Strauss from Houston, Texas and Woodbridge, New Jersey; "Married Dentists" Misti and Jim Raman from Columbia, South Carolina; as well as "Food Scientists" Amy DeJong and Maya Warren from Madison, Wisconsin. 

Hamilton and Dirks were the first to finish leg 9 and reach Phil Keoghan at The Fullerton Pavilion pit stop in Singapore, and they won a trip for two to Bali aside from the bragging rights of being the first placer. 

Several clips for the upcoming episodes have been uploaded in the official YouTube account of the hit reality competition. One of them shows the Ramans riding a jeepney, and seeing a part of the Philippines that has not been featured in any travel shows before. 

Meanwhile, an exit interview featuring the newly eliminated pair Kym Perfetto and Alli Forsythe was also released by CBS. In the interview, the professional cyclists admitted that they were disappointed to be booted out of the show. 

"I felt really confident and perhaps a bit cocky," Perfetto confessed. "It felt clear with the U-Turn coming up that it was a good move for us to do the Fast Forward ... Obviously, I do regret it because I feel like we could've stayed in the race. However, I do feel a little better about it having seen the episode and knowing that everyone was planning to U-Turn us. Either way, it was a gamble." 

"The Amazing Race" season 5 leg 10 airs on Friday, Dec. 5.