In this video the German cabaret performer Dieter Hildebrand explains the vital importance of trees for maintaining the Earth's water supply and for man's survival.

Brigitta finds out that her friends are having some trouble getting along as roommates and communicating about their expectations.

When Marie comes home and has a few complaints about living with Julia, it's clear to Brigitta that the two of them need to talk.

When all three friends are back at the apartment, Brigitta encourages Marie and Julia to speak about what's bothering them.

Julia met a really nice guy at a party that the three friends attended. The next day, they talk about how she should proceed.

German summers are getting hotter and hotter — but the Environmental Agency in the small city of Giessen, in the state of Hesse, has come up with an innovative tool for helping residents keep cool: a special city map! Copyright: Deutsche Presse Agentur [The German Press Agency]

In the first episode of Season 9 of Die Pfefferkörner, Emma is the only one of the pre-teen detectives left at school. Will she be able to keep the group going?

When a wallet goes missing in the girls' locker room, the girls immediately blame Nina, who is new at the school. Luckily, Emma and Max are already on the case.

Nina's first day at school really isn't going so well, but she rejects Emma's help and doesn't tell her father what happened. Meanwhile, Emma's dad settles into their new apartment.

When it becomes clear that his nephew Henri can't stay on his boat, Jan brings him to Emma's father, Hannes. Emma, however, is not happy to find that a guest has taken over her space in the attic – which also serves as the Peppercorn headquarters.

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.

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

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.

Max confronts Dragan about the money Dragan is demanding from Max's grandmother... then finds himself in a bad situation.

Emma is determined to help Max, who is being blackmailed by a drug dealer. Nina continues to claim that she doesn't need any friends and doesn't want to join the Peppercorns. Meanwhile, a student has a bad reaction to the happy pills...