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.

The situation comes to a head with debates about idealism and disappointment, values of the East and the West, and freedom and control. As decisions are made, personal relationships begin to falter.

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.

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 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.

Arthur now questions Christa Hartmann more thoroughly. Marlis and Gerd find themselves in a severe conflict. Their different views on future and responsibility put their relationship to the test.

The closer the train gets to East Berlin, the more everyone comes under pressure and increasingly loses their nerve. Paul Fuchs is also at the end of his strength.

In this episode, Edith receives a mysterious call from the People's Police. Arthur interrogates the young gymnast but doesn't get the answer he expects.

The imminent division of Germany is marked by deeply personal moments centered on love, freedom—and a little promise that can mean the world.

Personal desires and political reality are forcing all involved to make decisions now. Willi and Elke have found a solution for themselves, but the adults are having a harder time finding common ground.

From Brussels to Barcelona in just 30 minutes? The dream could soon become reality! Come along on a high-speed trip to the Netherlands and learn more about the futuristic vision of a Europe-wide Hyperloop transport network.

EFF is a collaboration between singer Mark Forster and DJ Felix Jaehn. The song "Stimme" has a positive message about trusting yourself.

These days, a lot of people are paying attention to their carbon footprint. Drinking straws are no longer made of plastic, toothbrushes are made of wood, and we're happy to forego that domestic flight to Munich for a long weekend—all for the sake of the environment. But there's one person who doesn't care: Felix, a rabbit from a children's TV series.

Jannika from "ZDF Magazin Royale" has to give Felix the Rabbit a piece of her mind. All of his traveling is no longer sustainable given its impact on climate change!

The "Femeiche" oak tree in North Rhine-Westphalia may well be the oldest living tree in Germany, dating from the first millenium AD. (video copyright dpa)