Welcome back, amazing viewers! It's the penultimate episode of "Amazing Race" and five teams are jetting off from Berlin to Edinburgh, where they'll head for Gosford House and face a double U-turn. The roller derby moms, who came in last last week, will face an extra challenge.

The newlyweds are in first place and there's much talk of alliances -- the newlyweds, country singers and hockey bros have agreed to U-turn the YouTubers and roller derby moms, if all goes well.

The country singers, hockey brothers and newlyweds all end up on the same first flight, and once the country singers figure out their car's parking brake is on, everyone is soon motoring down Scottish roads to a ginormous mansion where bagpipers and a band await. Now THAT's the way to play a bass drum. That is some significant drumming flair.

Roadblock: Bagpipes

In the first challenge, one member of each team must figure out how to play a harmonizing note on the bagpipes while marching around Gosford Hall, wearing a kilt, with the Royal Regiment of Scotland. "You have to keep a steady pressure in order to keep a steady tone," Max says, polishing off the task in record time.

Bates finishes quickly too, but Caroline is on her sixth attempt and having trouble. Her mouth is sore, her lips are chapped and she's crying. Even the regiment applauds when she finally finishes the task and one gives her a hug.

"I've found my husband in Scotland," she says. "He's 70 and his name is Jim."

Back at the airport, the roller derby moms and YouTubers have just figured out that they have arrived last: There are only two cars left in the parking lot.

Detour: Tasty puddin' or whiskey rollin'

Next up, the teams must search the Craigmillar Castle fireplaces for the next clue, which leads them to the detour and -- OMG, is that haggis?

In whiskey rollin', teams must deliver Scotland's most famous beverage to a country dance by rolling eight giant barrels. In tasty puddin', teams will have to stuff an ox's intestines with hearts, liver, fat and oats. Once they've made four portions and tasted them, they're done.

Barrels, people, barrels.

Bates and Anthony go for the barrels, like sensible people, rolling them, hoisting them on their backs and rolling some more. "We were working our barrels off," Anthony says. They head off to Duddingston Kirk in first place, looking for their next clue and the all-important U-turn board. Boom! YouTubers Meghan and Joey get the evil U-turn icon.

The newlyweds opt for haggis at the Sheep Heid Inn. A Robert Burns look-alike arrives to recite his "Address to a Haggis," an ode to the "great chieftain of the sausage race," as the newlyweds stuff the intestine. "The proof is in the eating," Burns tells them. They take a bite. "It's so good," Katie says.

The newlyweds U-turn the roller derby moms, as planned. The moms, however, have encountered their speed bump: They'll have to play skittles, which turns out not to involve fruity candies at all. It's kind of like bowling. They have to knock over 10 pins with a ball that does not have finger holes. Then it's back to the race.

Haggis is definitely the detour du jour. Everyone ends up choosing that one.

"You know what haggis is, right?" Meghan asks Joey.

"No," he says.

"You don't want to know," Meghan says.

Pit stop

The newlyweds are first to the mat in a cozy cobblestone alley, where Phil awaits with the Phantom of the Opera -- no wait, it's Jekyll and Hyde, a man dressed as half Jekyll, half Hyde. Max and Katie's prize for arriving first is a cool 10 grand each. Hockey bros Bates and Anthony are second and country singers Caroline and Jennifer arrive third.

Meanwhile, haggis task completed, our U-Turned teams are frantically rolling barrels before racing to the mat. The roller derby moms get lost on the way, but finally make it to the mat in fourth place. And Joey and Meghan are headed home.

Next time: The two-hour finale, in which scuba-clad racers jump in a puddle and apron-clad racers tote trays, as they compete for the cool mil.