After the border had officially been closed, the students were separated and often didn't know if their friends on the other side were OK. Luckily, a few letters got through.

The restrictions placed on residents of both West and East Berlin intensifies to the point where the classmates aren't even actually allowed to have contact.

Rüdiger and Bärbel attempt to escape into West Berlin, but it doesn't go according to plan.

While their classmates in the West graduate, Rüdiger and Christian come to terms with their life in the East Berlin.

Rüdiger finds himself in prison, subject to interrogation, and separated from his sister.

While Rüdiger and Bärbel face the consequences of their actions, the other former classmates move on in more positive ways.

Christian considers a dangerous escape plan.

Christian escapes by swimming across the border, but leaves Heidi behind. Rüdiger is suddenly presented with a new option.

In the conclusion of the film, find out whether Rüdiger leaves West Germany, and what each person in the group is doing today.

In this video, you can see the impressive peaks of the Austrian Alps, along with some of the animals that inhabit them in difficult conditions.

People living in the Alps are also anxiously awaiting spring. The Imster Schemenlauf is a traditional parade to drive out the winter.

As the snow melts in many areas of the mountains, plants and animals alike emerge in the fresh spring air.

In this segment, we follow a badger and a fox family through the beautiful sunlit forests of the alps.

In the spring, birds have to work hard to feed their hungry offspring and keep them safe in beautiful, yet harsh environments.

As spring struggles to break through, blooming flowers may be preserved in ice. Meanwhile, the male grouse tries to attract potential mates.