In 1914, Russia entered World War I in response to Austria-Hungary's declaration of war on Russia's ally Serbia. This was fought across multiple fronts while isolated from its allies. The Battle of Tannenberg, where the entire Russian Second Army was annihilated, cast an ominous shadow over the empire's future. The already-existing public distrust of the regime was deepened by the rising costs of the war and rumours of corruption. World War I takes Nicholas to the front. Back home, outrage grows over high casualties and Alexandra and Rasputin's political intrigues.

Nicholas II abdicates, and civil war erupts. In May 1918, a year after the revolution, the Bolsheviks sent Anastasia, Alexei, Tatiana and Olga to join the rest of the family in Ekaterinburg. They're put in the Ipatiev mansion and It's given the name 'The House of Special Purpose.' As pro-royalist forces close in on the house where the Romanovs are imprisoned, the family's fate is sealed.

This look at the life, success and scandals of golf legend Tiger Woods shows original footage and revealing interviews, including his former caddy and close friend, Steve Williams; golf legend and six-time major champion Sir Nick Faldo; Earl Woods' friend and biographer, Pete McDaniel; Tiger's first true love, Dina Parr; as well as Rachel Uchitel, the woman at the center of the sex scandal that forever altered Tiger's world, breaking her silence for the first time.

NASA is on a mission to send humans to Mars within just 15 years, but to reach this next frontier of space exploration, experts must discover new technology and cutting-edge science that protects astronauts from the Red Planet's deadliest killers.

NASA's revolutionary Juno Probe had a goal visiting Jupiter -- to reveal the deepest mysteries of the Solar System. Everything we see in the our planetary system today is affected by Jupiter somehow in the past or now. So in many ways, Juno is actually giving us a view into the history of the Solar System.
But there are many other questions. Does Jupiter have a core? Why it has a surprisingly warm atmosphere? What's driving Jupiter's storms? What is going on its weird cyclones, its gigantic swirls? The auroras of Jupiter are tremendously large, bigger than the planet itself. where are they coming from? What we're learning, what we're unlocking, it's mind-blowing.

Schwalmstadt Maximum Security Prison in Germany. Locked up behind the walls of this 12th-century castle are 188 of Germany's worst offenders. The prison is a fortress surrounded by a moat, and houses dangerous criminals, many of whom attend intense therapy sessions.