Germany is not a big enough country to devote all of its land to creating renewable energy – but there is another place with vast expanses of empty space and limitless sunshine.

Selma is happy that her family will get to stay in Germany, but she still misses her homeland. She tells Lisa about some of the differences between Germany and Syria.

Whitewater rafting and kayaking are very popular but also very dangerous sports in the Alps. Here we see some remarkable footage of a few daring individuals making their way through the thundering rapids.

Henning finds a potential lead regarding the runaway boy's identity, while Petri turns up at his former workplace yet again – this time armed.

Madame Gazelle leads a long jump competition between Schorsch and Linus. Who will win – and how will the loser deal with his defeat? Peppa offers up some wisdom.

In this segment, we finally glimpse the peak of the Großvenediger. Back down in the valley, families make hay without the usual farm machinery.

Nico's friends surprise him with paella, one of his favorite Spanish dishes. They talk about homesickness, but Nico seems quite happy in Germany.

Henning shows up at Harry's to discuss the problems he's experiencing in his relationship, and is disappointed when Harry expresses the same opinions as his girlfriend. Then the doorbell rings...

Selma tells Lisa about her family's life in Syria. At this point, many of the people she knew have moved away.

In this segment, we visit quaint settlements, a chapel carved into a rock, and a waterfall that seems to disappear into the earth, all at the foot of some of the tallest mountains in Europe.

Walter Petri refuses to believe that one of his designs could have been flawed, and is furious at his wife for talking with the company's boss behind his back.

In this video, physicist and author Harald Lesch talks about how Germany could phase out coal and nuclear power completely and still meet all of its energy needs.

In a rare close-up, we see the mother eagle working hard to keep its offspring fed. Then we get a look at the Innergschlöß, an 800-year-old Alpine settlement.

Nico arrives back at Inga's on crutches, but luckily with no broken bones. At the doctor's orders, he needs to take painkillers, use salve, and most importantly, stay off his leg – something he finds difficult to do.

At the station, the group tries to figure out whether Küppers is actually pregnant and where the young runaway came from. When Walter Petri returns to work and locks himself in his former office, the real reason for his early retirement is revealed.