GüselSeason 22015 · 9 episodesEpisodes1HerblingenThe detectives return to their territory in Herblingen, which Gabriel describes as the "Lugano of Northern Switzerland."2TrinkgeldA debate about the correct tipping etiquette for coffee leads to questions about the economic value of their work.3SperrgutAn old radio is found at an illegal dump site. Gabriel begins a forensic investigation involving DNA and fingerprints.4GrenzeThe team deals with the difficulties of waste disposal near the border and the differences between Swiss and German trash.5MeersauA dead guinea pig wrapped in a newspaper is found in the forest. The question arises: how does one dispose of a pet correctly?6RobidogA trail of dog waste bags through Herblingen inspires Michel to come up with a new business idea.7RauchenWhile Oli tries to start smoking, the detectives find ultrasound images in the trash, leading to dark suspicions.8PostA sample from an underground container leads the detectives to the local post office and their surveillance cameras.9StapfuchsThe season finale: Gabriel reflects on his career while a fox – or nature itself – is identified as the ultimate litterer.Season 1