On April 6, 1986 the Chernobyl nuclear power plant in the city of Pripyat, Ukraine exploded, melting down to emit more radiation than the two atomic bombs dropped on Japan during World War II.

Following the collapse of the Soviet Union, top secret documents have finally surfaced on the systematic cover-up by the Soviet government; they admit the true severity of the Chernobyl disaster. Archived footage and personal interviews by former government officials reveal how the disaster was concealed from the world, and how thousands of men were sacrificed in order to prevent the possibility of a secondary radioactive explosion that would have poisoned Europe, rendering it uninhabitable.

Russian documentary filmmaker Sergei Loznitsa brings the haunting images of the Siege of Lenningrad back into our collective memory in his reflection on the atrocities that happened in the past, lest we forget. From September 1941 to January 1944, lasting over 900 days, Hitler attempted to starve the city of Leningrad into submission. The siege of Leningrad was the longest of its kind during World War II, causing over half a million people to die, mostly from starvation.

Using rarely seen footage from the Soviet film archives, Loznitsa recreates a stunning historical account of the Siege, creating a state of the art soundtrack to accompany the silent footage. Blockade shows the gradual transformation of Leningrad: from its defensive beginnings to a horrific aftermath.

In 1966 two American airplanes collided over Palomares, Spain and as a consequence, four H-bombs fell to earth. Two of them explode their conventional charge and due to the strong wind radioactive material is scattered over the region. An intensive search is stared to find the fourth bomb. At the same time, decontamination process of the zone is starting and the residual contamination of persons and environment begins to be checked and also the Proyector Indalo, still running 41 years later.

Off the coast of Nova Scotia lie remnants of the wars of the 20th Century. It is not the only global dumpsite of its kind. Hundreds of thousands of tonnes of highly toxic materials are scattered on ocean floors – in rusting barrels releasing lethal contents. What to do with the massive armour produced in two world wars and the cold war? Bury it at sea, of course. The folly of this decision seems clear to us but in our vast oceans marine species and coastal communities are at risk as a direct result of these highly secretive decisions. Buried at Sea, takes us on an incredible journey to the most dangerous dump sites and current efforts to rectify the imminent danger ahead.

A mysterious explosion erupts in the northern Italian town of Seveso at its Icmesa factory in 1976. Hidden from the public, the story leaks as the impact of poisonous dioxin from its reactor exposes children to chemical burns, 77,000 animals die and the environment is radically transformed - resulting in a mass evacuation. At the heart of the storm is Jorg Sambeth, the technical director of Givaudon which is responsible for Icmesa, a company belonging to the Swiss Hoffmann La-Roche pharmaceutical conglomerate. Not a simple story the film questions who bears the ultimate responsibility. What was really being produced at Icmesa? For whom? And, how does a transnational corporation protect its interests? These are all part of the fascinating puzzle revealed in this riveting, troubling documentary.