This German format is not a series properly speaking, as it has no permanent cast or script continuity, but presents each time a 45 minutes documentary, usually in part presented as a docudrama (not faction, as close to scientific knowledge as possible, but visually attractive),elaborating a specific historical theme, widely varied, often exotic in the sense of a far time (as far back as prehistoric times) and/or place (around the globe),although some episodes fit together well, chronologically or thematically, but always fit to be watched separately. Usually authentic locations are used, as well as scenes from and/or interviews about the scientific research it is based upon.