This Italian-Turkish co-production helmed by genre veteran Antonio Margheriti (using the pseudonym "Anthony M. Dawson") was cobbled together from a four-part science-fiction miniseries shown on Italian television. In prehistoric times, the muscular Yor (Reb Brown in a loincloth) saves his cave-babe (Corinne Clery) from a dinosaur just before they get zapped into the future to battle bad guys in the familiar desolate wasteland. Genre stalwart John Steiner (Caligole) and the ubiquitous Luciano Pigozzi co-star with Carol Andre.

A girl and her brother fly to New Guinea to look for a lost expedition, led by her husband, which has vanished in the great jungle.

With the intention to venture into the unexplored areas in the deep jungle of the Amazon rainforest at the border between Brazil and Peru, in 1979, a film crew composed of four young Americans attempted to make a documentary about the never seen before indigenous cannibalistic tribes. However, it's already been two months since anyone last heard from the crew, so without further delay, the noted anthropologist Professor Harold Monroe and his rescue team of the seasoned guide Chaco Losojos and his assistant, embarked on a mission to locate them in the depths of the Green Inferno. Following the Yakumos, a tribe that no white has ever seen before, soon enough, the Professor's rescue party will encounter the elusive Yanomamos or Tree People and the fearsome Shamataris or the Swamp People. Eventually, as more evidence is found concerning the fate of the film crew, the Professor will try to recover the raw footage that was paid in blood, and return it to New York to the executives of the ... Written by Nick Riganas