(Click CC for subtitles) Descending to remarkable depths below the sea on one single breath, Alessia Zecchini enters what she describes as the last quiet place on Earth. The Italian champion is determined to set a new world record in freediving, a dangerous extreme sport in which competitors attempt to reach the greatest depth without the use of scuba gear. Freedivers are often subject to blackouts upon ascent, necessitating the help of safety divers like Stephen Keenan, a free-spirited Irish adventurer who fell in love with the sport in Dahab, Egypt.
Having formed a special bond on the freediving circuit, Alessia and Stephen train together to make an attempt on Dahab’s legendary Blue Hole and its challenging 85-foot-long tunnel 184 feet below the Red Sea, their fates inextricably bound together.

Octavian takes a new bride, Livia, and then introduces her to his family in a startling way... by having her witness the punishment he metes out to Atia and Octavia, for secretly defying the social constraints established through the facade of Octavia's marriage to Mark Antony. The vengeful Gaia carries out her plan to poison Eirene, which produces most dire consequences for Pullo, and no one else is the wiser.
Meanwhile, Octavian, Antony, Maecenas, and their associates barely maintain their relationships of congenial contempt and hypocrisy, as everyone tries to figure out who has duped whom with the disappearance of the gold that was Herod's 'gift.'

This episode looks at a group of black survivalists. British Buzzfeed correspondent Bim Adewunmi looks at an unusual group of doomsday preppers who don't fit the normal stereotype for that group. She interviews people of color who train themselves to prepare for disaster.

Ludo Lefebvre apprenticed under – and learned from – some of France’s most esteemed chefs, but it took a move to Los Angeles, starting a family and a rough restaurant review for him to figure out what he really wanted to do with his culinary future.
This episode examines the ties between artists and their education, and how childlike wonder can, in fact, translate into a career. The question Ludo poses is whether an artist follows instinct, training or intuition… or perhaps all three.

Garrett McNamara recovers from the injuries he sustained at Mavericks and begins training to return to Nazaré for another season. While surfing at Indonesia's G-Land site, Garrett suffers more injuries that threaten to take him off the waves permanently. Meanwhile, a friend of Garretts catches an 80-foot wave at Nazaré, taking the world record from McNamara. McNamara resolves to continue his hunt for a 100-foot wave.

How does a chef trained in the finest kitchens of France translate his haute cuisine to fast food? Ludo’s obsession with a perfectly cooked bird can be traced back to France, where he learned to roast chicken.
His love for the American classic was solidified in 1996 when he arrived in LA and ate at KFC for the first time. “It was the same sensation,” he’s said, the crunchy skin and juicy flesh, and the gap between his two worlds was bridged. In this episode we learn how a Frenchman became famous for a truly American dish.