André Wiersig is aware that most people think he is crazy, but for him, crossing the straits and swimming in the ocean is much more than just an athletic challenge.

Strength training is also part of André Wiersig's preparation for his aquatic challenges. That can sometimes be quite painful... This extreme swimmer tells us how he manages to keep the pain at bay.

André Wiersig has had some brushes with death in his time. He tells us about his experiences and the peaceful relationship he has with the other species that swim with him in the ocean.

How does André Wiersig prepare for the cold? How did he get into the game in the first place? Watch this clip to find out.

The 18-kilometer Fehmarn Belt Tunnel connecting Denmark and Germany will be the longest immersed tunnel in the world. This video explains how 360,000 tons of steel and 3 million cubic meters of concrete are being used to create the tunnel, which will run between Rødbyhavn on the island of Lolland and Puttgarden on the eastern coast of Schleswig-Holstein.

To everyone's surprise, some last-minute adjustments are made to the commercial. But they should have known that Hansen was always going to have final word.

The commercial has been shot and is now ready to be edited. Mr. Hansen has also come to see the results, accompanied by Ms. Gerstenberg. The look on his face speaks volumes...

Now all that's missing is the music for the commercial. The agency has brought in the experts to produce a suitable rap with children. And Mr. Hansen finally makes a personal appearance to see the results.

The shoot seems to be going really well until a problem suddenly comes to light, and Lutz and Adrian immediately blame each other. Can they work it out before the client notices?

Here we witness the crew's extensive preparations for the Twinfruit shoot and see Strawberry and Orange in action. Ms. Gerstenberg and Mr. Müller from the Hansen company are most impressed by what they see.

The age of Homo erectus has dawned! What abilities did he have and in what ways did he resemble modern humans? To find out, watch this video, which ends with a quotation from one of Germany's greatest poets, Friedrich Schiller.

The representatives from Hansen and Gunnar's team meet to discuss all the steps that need to be clarified before production. There seems to be general agreement on the idea, but it's not without some tense moments.

Lutz Wolf and Mr. Kleiber have now definitely convinced Hansen himself of their campaign. Now it's time to get down to the real work. Lutz and Adrian first want to see how mankind's inner banana has been brought to life in the form of a costume.

Although many of the actors go home disappointed and even humiliated, two lucky ones get cast as a strawberry and an orange. Meanwhile, Gunnar has some bad news for Lutz regarding the client.

Lutz and the director Adrian Kosinovic talk about and clash over the production of the commercial. Adrian tells us what fascinates him about his work, and we also get to see some of the casting process.