The detectives investigate a case of illegal arugula disposal, which Gabriel considers a sign of societal decay.

Searching for addresses in trash bags is the daily bread of the garbage detectives, leading to deep philosophical insights.

A discarded diaper leads to a profile of the perpetrator, but the investigation gets stuck in technicalities.

Gabriel tries to introduce children to the craft of garbage detection as part of a holiday program.

A "Fleischvogel" (stuffed meat roll) found in the trash poses a mystery: is it organic waste or a biological hazard?

After the carnival celebrations, the town is covered in confetti, and the detectives search for a "masked" litterer.

While Michel repairs jewelry, Gabriel analyzes chestnuts, leading to a debate about nature and waste.

Oli shares his conspiracy theories about appetizer snacks and why he avoids parties on Sundays.

The international dimensions of garbage disposal are discussed while the team waits for a breakthrough in a stakeout.

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.