A team of Australian and Chinese scientists discover mysterious ancient human remains from a remote cave in South West China. The bones are unlike any living human or any ancient human known to science, yet they were alive at the same time as humans of our own kind. Could they represent a new human species? And if so, what happened to these people?

In the fourth episode of the series, an unexpected confession casts doubt on Steven's role in the murder case, but the new suspect gives conflicting accounts of what occurred.

In the fourth episode, leading landscape photographer Peter Eastway follows in the footsteps of Frank Hurley – the pioneering Australian photographer on Shackleton’s expedition to the south a century ago – to capture the wilderness and wildlife of Antarctica and South Georgia.

Director Chris Bell turns his camera on the abuse of prescription drugs and, ultimately, himself. After witnessing friends and relatives face tragedy as they become addicted to prescription drugs, Bell sets out to explore the goals of pharmaceutical companies and doctors in this ever-growing market, and asks how they are any different from back-alley drug-pushers. His journey leads to experts on the nature of addiction in our culture, as well as to pharmaceutical whistleblowers that testify to the solely dollar-driven aims of pharmaceutical companies.

Bitcoin is the most disruptive invention since the Internet, and now an ideological battle is underway between fringe utopists and mainstream capitalism. "Banking on Bitcoin" shows the players who are defining how this technology will shape our lives. Bitcoin's early pioneers sought to blur the lines of sovereignty and the financial status quo. After years of underground development Bitcoin grabbed the attention of a curious public, and the ire of the regulators the technology had subverted. After landmark arrests of prominent cyber criminals Bitcoin faces its most severe adversary yet, the very banks it was built to destroy.

In the center of the story is the life of the indigenous people of the village Bakhtia at the river Yenisei in the Siberian Taiga. The camera follows the protagonists in the village over a period of a year. The natives, whose daily routines have barely changed over the last centuries, keep living their lives according to their own cultural traditions. Werner Herzog and Russian co-director Dmitry Vasyukov takes viewers on yet another unforgettable journey into remote and extreme natural landscapes. The acclaimed filmmaker presents this visually stunning documentary about indigenous people living in the heart of the Siberian Taiga. Deep in the wilderness, far away from civilization, 300 people inhabit the small village of Bakhtia at the river Yenisei. There are only two ways to reach this outpost: by helicopter or boat. There's no telephone, running water or medical aid. Follow the Siberian trappers through all four seasons of the year to tell the story of a culture virtually untouched by modernity.