All episodes

The detectives return to their territory in Herblingen, which Gabriel describes as the "Lugano of Northern Switzerland."

A debate about the correct tipping etiquette for coffee leads to questions about the economic value of their work.

An old radio is found at an illegal dump site. Gabriel begins a forensic investigation involving DNA and fingerprints.

The team deals with the difficulties of waste disposal near the border and the differences between Swiss and German trash.

A dead guinea pig wrapped in a newspaper is found in the forest. The question arises: how does one dispose of a pet correctly?

A trail of dog waste bags through Herblingen inspires Michel to come up with a new business idea.

While Oli tries to start smoking, the detectives find ultrasound images in the trash, leading to dark suspicions.

A sample from an underground container leads the detectives to the local post office and their surveillance cameras.

The season finale: Gabriel reflects on his career while a fox – or nature itself – is identified as the ultimate litterer.