ZDF and ZDF Enterprises regularly work together on factual co-productions with some of the most distinguished documentary broadcasters and producers in the world. ZDF Enterprises has been particularly successful with projects relating to contemporary history, in which turning points of the 20th century are depicted in dramatic fashion. Military history has certainly been a bright spot, but the company also regularly engages in co-productions touching on ancient history and archaeology, science and technology, and wildlife and nature. Kristina Hollstein, the director of documentary co-productions and development at ZDF Enterprises, recently sat down with World Screen to discuss the current crop of projects that are in the works. She also tells us about some of the greatest challenges in putting together a co-production nowadays and about what ZDF Enterprises can offer as a partner that is unique.