They called him “The Hangman”. Reinhardt Heydrich, became one ofthe most hated men in all of occupied Europe. He was the real mastermind behind the “Final Solution” and created the blueprint for the Holocaust. Heydrich’s ambition knew no bounds, he even wanted to replace Adolf Hitler. He ruled occupied Czechoslovakia with a rod of iron and thought himself untouchable. But in London, a top-secret hit squad had different ideas. They began to target Heydrich for execution…

100 Greatest Toys with Jonathan Ross is a 2.5 hour countdown of the nation's favourite toys and games. From Action Man to Yahtzee, and from Barbie to Trivial Pursuit, inventors and toy-makers tell the inside stories of their creations and success. And to fully explain the impact of these toys and games, the children of yesteryear - today's celebrities, authors, actors and journalists - reveal exactly what it was that made them love a particular toy. Find out how Action Man evolved from the American GI Joe action doll and just how Tomorrow's World inspired his haircut.

The story of the Jewish Avengers after the Second World War has been rarely told. For the first time, a group of men and women, now in their 80s, tell the extraordinary story of how some Jews decided after the war had ended to seek brutal and shocking “eye for an eye” revenge on the Germans. They believed that those who’d delivered the holocaust had simply not paid a high enough price.

Joseph Mengele who experimented on adults and children in the Auschwitz death camps. He was a prime target and was, for many years, the world's most wanted criminal. The Hunters were Simon Wiesenthal, the UN War Crimes Commission and even Mossad. But none of them succeeded. Wiesenthal lacked the resources. The official investigators made blunders, twice letting Mengele slip through their hands. Mossad preferred to concentrate on Eichmann. After the war, the victorious powers had literally millions of POWs to screen. Among them were 22 people called Josef Mengele. So even though the hunt was one for the "Angel of death" of Auschwitz, he simply got lost in an American POW camp. Once out, Mengele was simply able to slip out of view thanks to the Nazi escape organisation, Odessa. But one man would not give up on him. Simon Wiesenthal had been imprisoned in concentration camps twice during the war, but managed to get out of the first through a degree of collaboration. He was re-captured after a year and survived because his new guards needed prisoners in order to escape being sent to fight on the Eastern Front.

For the animals in the polar regions, autumn means dramatic battles and epic journeys. Time is running out - the Arctic Ocean is freezing over and the sea ice is advancing at 2.5 miles per day around Antarctica. Polar bears gather in large numbers on the Arctic coast as they wait for the return of the ice. Soon, tempers fray and violent sparring contests break out. Meanwhile 2,000 beluga whales head for one special estuary, a gigantic 'whale spa' where they will thrash their snow-white bodies against the gravel and exfoliate. Inland, the tundra undergoes a dramatic transformation from green to fiery red. Here, musk ox males slam head-first into each other with the force of a 30mph car crash as they struggle to defend their harems. Frisky young caribou males play a game of 'grandma's footsteps' as they try to steal the boss's female.

The Serengeti is a vast ecosystem, home to a dazzling variety of life, and the site of the largest migration on the planet. Woodland, riverbank forests and swamps provide cover for dozens of mammal species and more than 350 varieties of bird. The fate of these animals is intimately bound with the ever changing landscape. The passage from the rainy season to the dry season means there is no rest and no stability. Those who dwell here must remain in constant motion to survive. For months they live in hope of the returning rains that will put an end to their struggle and reward their efforts.

Once the hub of a vast trading network, today the Spice Island is mired in poverty. Now Zanzibar's people must fight back with ingenuity and resourcefulness if they want to chart a new course for the future.

It's Predator vs. Prey Like Theyve Never Been Seen Before. For the first time ever, brand-new advances in Video-Based Motion Capture and 3D Motion Tracking technology allow a groundbreaking look inside the bodies of animals in motion while they are performing real, natural behaviors at the most critical times: on the predatory razor's edge between life and death. It's the most iconic predator-prey imagery of all time like it's never been seen before. Through dramatic and unprecedented Video-Based Motion Capture analysis of attack sequences, The Perfect Beast looks at both predator and prey to see how each is uniquely suited biomechanically to play their part in the food chain.

Speer's crimes included using and organising slave labour in death camps and prolonging the war by his fanatical work to develop the Nazi war machine. He was hunted by two groups. The UN War Crimes Commission, but first he was wanted by the US Strategic Bombing Survey. This strange group of people included the economist JK Galbraith and the veteran arms negotiator Paul Nitze. These were hardly hardened prosecutors and they had authorisation from the highest level to keep Speer out of the hands of the Criminal Investigators from the UN. They tracked Speer down and spirited him away to a country house after the war, where he was extensively questioned, giving the Americans detailed information about the effectiveness of US bombing. This was critical intelligence and would eventually shape much of US strategy during the Cold War. When this story leaked out it caused huge controversy as the hint has always been that the Americans agreed to go easy on Speer at his trial in exchange for his co-operation.

The impending disappearance of salmon will have profound effects on the world. Uncover the remarkable and vital role this fragile fish plays in sustaining richly diverse ecosystems.