Návštěvníci (The Visitors) is a Czechoslovak sci-fi TV series filmed between 1981 and 1983 by Czech director Jindřich Polák. The 15 parts were co-produced with television-companies of the Federal Republic of Germany (West Germany at that time), Switzerland and France. As an additional 16th part for Germany a "Making of" was produced under the title "Besuch bei den Besuchern" (Visiting the Visitors). In West Germany the series got the title Die Besucher (The Visitors), in the German Democratic Republic and Australia it was called Expedition Adam 84.