Train, Wavelength, Capture (電車, 波長, 捕獲) is the 10th episode of the anime adaptation.
The girls drive their Kettenkrad onto a goods train, finding its carriages filled with broken down machines. They disembark at the last station and ride an inclined elevator towards the top of the building.
As they ascend, Yuuri starts hearing music coming from the radio she picked up earlier which they hear more clearly as they reach the surface. The next day, as the girls explore a large hole for some drinking water, they discover a small long, white life-form. They discover that it can communicate with them using their radio. Naming it "Nuko", the girls decide to take it with them on their journey.