In Part 2 of “The Lost Key,” Kasper and his friend Seppel search for the king’s missing key together. They finally track down the thief — but will they be able to outsmart it?

Yamina of “Moin Yamina” is an influencer based in Malaysia, where wearing a mask when you're sick has long been part of everyday life. Here, she shows us how to make stylish masks at home using old items of clothing.

As part of Lisa's German lesson, Nico and Selma discuss their interests. Nico learns that Selma has never learned how to ride a bike, so he offers to teach her.

After the Peppercorns wrap up the case of the stolen wallets, Max sets off on his bike to his grandmother's food truck – and has an unfortunate encounter along the way.

Kasperle, or Kasper, is a traditional puppet character from the German-speaking world, and “Kasperletheater” (Kasper shows) are performed in a manner similar to that of the UK’s “Punch and Judy.” Here, the King has lost the key to his beloved treasury—and, with the King’s promise of a reward, Kasper is eager to help him find it.

In a tense confrontation with her landlord, Yara learns that the rent she pays for her bicycle shop will increase starting in January.

Henri and Emma finally chase down the thief – and prove that Nina didn't steal any of the wallets.

Here's a flashback to when Frankfurt Airport was buzzing with activity. The airport opened its doors in celebration of Mother's Day, offering special activities and prizes. Despite strikes at the time, the transportation industry was doing quite well.

In Part 2 of this episode, Oliver discusses the problems that schools face as they begin to reopen in Germany — and also looks at the implications for summer vacation plans.

Nico and his new roommates talk about his relationship with his brother, Pepe. Then Lisa gets some good news.

Brilliantly colorful parrot fish and two-bar sea bream are among the fish featured in this segment. Sea cucumbers, the vacuum cleaners of all the Earth's oceans, also make an appearance.

Justus Kliss offers an analysis of Chancellor Angela Merkel's coronavirus television address and what it means for the coming weeks. He compares her strategy to that of French President Emmanuel Macron, and finds it admirable how she focuses on solidarity.

How do coral reefs form, and what role do they play for underwater creatures such as fish? In this video, you can see some fascinating life forms and how they interact with one another.

In Part 2 of the interview, Lotte and Max Giesinger discuss the variety of experiences they've had as performers, how hard it can be to get discovered, and some of the worst gigs they've ever played.

After a second wallet is stolen, everyone becomes even more suspicious of Nina. Max is still convinced that she didn't steal anything, and while he and Emma are in math class, Henri stands watch outside the gym.