Do you know the names and locations of Germany's most important rivers? In this video, Paula takes us through the list of those with the greatest number of kilometers within Germany.

Elias has somewhere new to hide out for a while. Meanwhile, Paul and Dirk have a heart-to-heart.

This song is about the early stages of a relationship when everything is so wonderful and you hope it will last forever, but there's always this nagging feeling that it won't.

In this clip, Eylin teaches us some important expressions for navigating an unfamiliar town. It's a good idea to practice asking for directions now so that you'll know how to do it when the time comes!

Paula shows us Heidelberg at its most beautiful, including the wonderful old town with inviting cafes, the famous university, and much more.

Dirk finally meets up with Elias. Suddenly, his colleagues from the homicide squad show up, and Elias recognizes one of them. After getting some key information, Dirk is starting to connect the dots.

In this video, Paula shows us one of Germany's most picturesque cities and tells us about its most important sights.

The cab driver's alibi doesn't add up. Matthies wants to meet Elias but is stopped by his colleagues from the homicide squad.

Jonas's world implodes when he realizes that Oswald has gone. His father must have discovered his hideout...

The team is making some headway, despite the fact that Hannes has made a little error in his investigations. Meanwhile, Elias finally decides to meet Dirk.

Dr. Hansen still doesn't have any patients, and his daughters are getting worried, too. Is there anything they can do to help? Meanwhile, he finally meets Jonas's family.

14-year-old Kim Heizmann has proven that soccer is about so much more than scoring goals. In fact, he very probably saved the life of the opponents' goalkeeper during one match.

This song by Austrian pop group Wanda is about humanity's enduring fear of the apocalypse and the desire to shield one's loved ones from feelings of dread.

Hannes finds himself dealing with unexpected feelings. Meanwhile, Dirk and Paul talk with Onna and find out a bit more about Eilas. Elias is staying with his father, who is trying to protect him.

Oswald the dog is ill and Jonas is very worried about him. While his father is getting ready to put Oswald out of his misery, Jonas seeks help from the new vet in town.