Everything has to be sustainable nowadays, but so many claims of "sustainability" are nothing more than greenwashing. Greenwashing is only about looking green, selling products, and easing the conscious of the consumer, but not about actually working to protect the environment.

Having been upset by Wolf again, Mark is on the verge of turning back. But Lisa talks to him, and her words seem to have an effect.

André Wiersig has become an ambassador for the seas and shares his experiences in talks—he sees this as his purpose on earth. Now he has swum across all seven straits, the last one being the Strait of Gibraltar. What will be his next challenge?

Merle delivers the speech she has prepared for Schotty, which he finds deeply moving, and the two of them end up in each other's arms.

The crew of Starship Hummingbird are doing everything they can to make contact with the unidentified flying object. Will they be successful?

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.

Now things are getting serious: The crew is getting ready to launch, and the two young pilots are eager to go along for the ride. Will they be able to persuade their fathers to let them?

The next person Schotty encounters is Merle, the love of his life. They talk about their relationship and mutual regret about having so little time together, but she seems to know something he doesn't.

The new recruits of the Milky Way security force arrive for training. Pierrette is worried about Fat Nose's threatening behavior. Meanwhile, the UFO enters the ship's observation space. This calls for immediate action!

Martin's boys get into a fight, which threatens to derail the whole expedition to climb Gran Paradiso. Will Lisa manage to calm everyone down?

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.

The situation is getting more and more bizarre and Schotty is starting to feel uneasy about it all. He just wants to get away.

The representatives of the confederation, chaired by the President, are now to vote on how to deal with the unknown flying object. There is no consensus at all!

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.

An unknown flying object appears on the radar. Pierre, Pierrette, and Maestro discuss where it might come from and whether it might be hostile.