The investigator Arthur gets one step closer to uncovering the secret behind the mysterious substances found in the baby carriage. Train driver Edith and Kurt, the cameraman, are also getting to know each other better.

The train is approaching Bamberg, causing the passengers to speak frankly with one another. Gerd is standing in the corridor and Marlis is sitting in the compartment. What will he decide?

The pressure on the train passengers increases as the train gets closer to East Berlin. Political views and personal desires and fears differ greatly, making it very difficult for couples to reach a decision.

Many forest dwellers are already preparing for the cold season. We see marmots and many rare bird species that make Switzerland a magnificent natural spectacle even in late summer.

In the inter-zone train to East Berlin, people listen to the distressing radio reports. At the same time, we get insight into the lives of other people on this August 13, 1961 - the day when the Berlin Wall is erected and begins to separate its residents from the rest of the world.

Along the Anterior Rhine, the day begins with feathers, fur, and fine fibers. Among bathing birds, furry newcomers, and artful nests, nature prepares for autumn—with guests who stay and those who only briefly linger.

In the second part about summer in wild Switzerland, we see golden eagles, marmots, and the rare Danube salmon. In particular, we get a good sense of the hard fight for survival in this beautiful paradise.

In the floodplain forests and swamps of the nature reserve, there is an abundance of beautiful and rare plants. The population of ibexes is also thriving once again.

What are the top five most popular German federal states for tourists visiting from other countries? Find out in the conclusion to this video.

Germany has sixteen federal states. What does each state have to offer tourists? And where do foreign visitors mainly go?

Antonia confesses everything to the principal, and Martin Schulze can return to school. But Antonia's behavior has consequences...

August 13, 1961: A fateful message reaches the train bound for East Berlin: The construction of the Wall has begun. The passengers now have three and a half hours to decide—home or freedom?

With Sophie's help, the young detectives are able to record a conversation between Antonia and Sophie that proves Martin Schulze's innocence.

Erfurt is a city in Thuringia with a charming, historical center. Ivana shows us its old alleyways, buildings, and other landmarks.

In the second part of this video on the Frankfurt silver inscription, various experts explain why this find is so special.