At 9:22 AM, Mirna and Charla and Danny and Oswald land.
The BQs find the palace. They run through the gates and follow the sound of the piano to Fauxpin, who's playing on a lawn. They rip the clue, which is a Detour offering a choice between Perfect Angle and Perfect Pitch. In Perfect Pitch, you go three-quarters of a mile and choose a piano and a set of tools. You use the tools to tune a single key on the piano, and then once a pianist plays a little Chopin and tells you it's okay, then you're good to go and you get your clue. In Perfect Angle (which is inspired by Marie Curie), you go a half-mile to the Escada boutique and grab a mannequin. Wait, seriously, this will relate to Marie Curie in a minute. Okay, you carry your mannequin to a diagnostic lab and take X-rays of it, and if you take the X-ray at the correct angle, you'll see the words of the clue spelled out. That is definitely the most morbid Detour of all time, spotting the clue that's been implanted in a mannequin. It's like something from Medical Malpractice Illustrated. Dustin thinks she can get the piano in tune, so they choose that. They get back in their cab. Dustin explains that with her piano experience, she ought to be able to figure out the tuning with the help of the promised demonstration.
Charla and Mirna get a cab. Apparently determined to dance with Polish stereotypes like Solid Gold dancers, they decide to have a little "hilarious" "fun" at the driver's expense. "You like Polish hot dogs?" Charla asks. "You like Polish sausage?" Mirna asks. He doesn't answer. He doesn't smile. He doesn't find this funny. "He doesn't like us too much," one of them says. I'm sort of glad they stopped with the hot dogs and the sausage, if I'm being honest. It could have been worse. Oswald and Danny get a cab, and they're providing a little contrast as Oswald apologizes to the driver for speaking to him in English and presuming he spoke English. The guy assures Oswald it's fine. Somehow, that exchange worked better as an ice-breaker than "You like Polish hot dogs?" Europeans are so touchy. Go figure.
The BQs arrive at the palace and have their driver wait. Inside, they observe the demonstration, in which the tuner uses a sort of a stopper piece to isolate each of the three strings that go with each key, so he can see which one needs tuning. And then you use a sort of a wrench to turn the bolt (bolt? Probably not) and tighten or loosen the string. They find the bum key on their piano with no problem, and Dustin (I think) whispers, "This is going to be fun." Dustin uses the "wedge," as she calls it, to pick out the string, and then she's not sure whether to tighten or loosen.