In this video, you will learn what a gnomon was used for, who Euclid and Eratosthenes were, and what secret Archimedes thinks he discovered after his apprenticeship with Euclid.

In this ballad, Max Prosa reflects on fragile beginnings, when love is still new.

Adalbert's mother thought it was a good idea to give the children a chemistry set – that is, something educational — to play with. But her plan backfires when Nick and Adalbert end up causing quite a bit of trouble!

In Part 2, you'll get to know more gemstones and learn about their origin and uses, as well as the properties that are attributed to some of them.

Ancient Greece was home to many great thinkers, such as the physician Hippocrates, the philosopher Socrates, the sculptor Phidias, and the mathematician Archimedes.

A long afternoon lies ahead for Nick and Adalbert, and they really don't have much in common. Will they find something fun to do? Adalbert already has an idea, which at first seems rather daunting...

Do you love gemstones and minerals? Then check out this video, where Eylin gives you fascinating info about all kinds of semi-precious stones.

The cold weather and a shortage of food eventually drove the Neanderthals to extinction, clearing the stage for Cro-Magnons, our direct ancestors. But you'll have to wait for the next episode to find out more about that!

Sascha rises from the dead, and suddenly discovers his commitment to nurturing young talent. He and Jan Böhmermann might be teaming up! Meanwhile, Dr. Wolter reveals to Billie why she envies her.

In "Roulette," Max Giesinger sings about flirting with a new neighbor who gives mixed signals.

"Wandern" ("Wandering") is a beautiful, reflective song about the journey we take through life, both alone and together with others. It's about being connected and disconnected, and experiencing life's ups and downs.

Nick was looking forward to enjoying his day off school, but it turns out his mother has other plans for him.

The climate is getting colder, the animals are disappearing, and the Neanderthals are gradually running out of food. Times are tough, and the Neanderthals are being forced to do whatever they can to survive.

It's up to Billie to finally put a stop to all the havoc that Jan Böhmermann has caused. With Dr. Wolter exposed and Sascha out of excuses, maybe Billie can finally save the future of German television.

Mr. Lehmann is finally a free man after three years in prison and is out enjoying the fresh air on his racing bike. Is this the happy ending we've been waiting for?