Through Hugo's film "People of the Forest" the world came to know members of Gombe's "F" family, namely Flo, Fifi, and Flint, in addition to a number of their other immediate relations. By the time he stopped filming at Gombe, he had created a visual record spanning over twenty years and documenting the lives of three generations of chimpanzees. Hugo made a number of wildlife documentaries for television, but also made several films for theatrical release on 35 mm film, such as "The Leopard Son" and "Serengeti Symphony", both produced by Nature Conservation Films WW. Besides making films himself, Hugo was an important influence and mentor to a younger generation of wildlife filmmakers. His tented camp, Ndutu, in the Serengeti, became through his guidance a breeding ground for new wildlife film-makers.