Hours before Mehmed II launches his final assault, an ominous sight shakes both sides. Rumors of a 40-ship fleet's imminent arrival have swirled for weeks, but it's exact whereabouts remained unknown. Ottoman cannons reduced the city walls to rubble, and Venetian reinforcements arrived too late. The conquest of Constantinople ushers in a new era for the Ottoman Empire, being a dominant force in world politics for 300 years. Mehmed II, in many senses, changed the nature of world history.

The final episode of the series ponders the fate of planet Earth. Neil deGrasse Tyson opens with a reflection on science and those who help us understand it: 'We all feel the weight of the shadows on our future, but in another time, every bit as ominous as our own, there were those who could see a way through the darkness to find a star to steer by.'
The young Carl Sagan and Neil Tyson first discovered their passion for science at the NY World's Fairs of the past. We visit the dazzling Pavilions of the 2039 NY World's Fair, where problems we currently think intractable have been plausibly solved through public commitment and scientific imagination. And our baby is a woman now, with a baby of her own and a future bright with possibilities.

Our universe reveals itself in ways we’ve never seen before, thanks to new discoveries in astrobiology. Today, the advent of cutting-edge observational instruments is shedding light on amazing facts about life and the universe. NASA's next-generation space telescope TESS (Exoplanet Survey Satellite) has begun its search for Earth-like planets belonging to other star systems. How many of these 'exoplanets' can host life, and what kind of life forms can evolve in these environments?

Phil Jackson brings a new philosophy to the Bulls after replacing Doug Collins and takes the Bulls to the next level. He manages to not only connect on a deep level with his players, but also install the Triangle Offense, a key turning point in Chicago's dynasty.
The Bulls finally eliminate the Pistons in the 1991 Eastern Conference finals and earns a shot at an NBA title. But controversy ensues when Detroit players walk off the floor before the end of regulation without engaging in the customary postgame handshakes.

Astronomers are giving us astonishing news, visual proof of the reality of black holes. Stunning new findings are overturning conventional theories. The most common vision of black holes is that they are monstrous and mysterious bodies swallowing everything around them. However, the latest discoveries are drawing a link between black holes and the existence of life. A startling new picture is emerging. The existence of black holes is what made life on Earth possible.

The documentary follows a team of reporters from The Indianapolis Star as they investigate claims of abuse at USA Gymnastics, one of the nation's most prominent Olympic organizations. Two years later, an Olympic doctor is behind bars, the US Congress is demanding answers and hundreds of survivors are speaking out.
Equal parts devastating and inspiring, the film reveals the culture of cruelty that was allowed to thrive within elite-level gymnastics, the attorney fighting the institutions, and most importantly, the brave athletes who refuse to be silenced, fought the system and triumphed.