S3 E10 — Tornado Terror
A twister outbreak in Texas leaves a storm chaser trapped; in Florida, dangerous riptides drag swimmers out to sea; a sudden storm hits a holiday resort in Greece; a giant wave crashes through a restaurant in Italy.

S3 E11 — Nature Unleashed
The LA Fire Department battle to rescue residents trapped by the flames in California; the biggest twister to hit the US for 60 years rips apart Joplin, Missouri; in Antarctica, a husband and wife brave extreme elements to set a new record.

S3 E12 — Fearsome Flooding
Queensland, Australia is shaken by the most devastating flood in its history; in Kansas, two storm chasers track a terrifying twister; a base jumper gets stranded in freezing temperatures in Iceland; a destructive hail storm pummels Texas.

S3 E13 — Hawaii Volcano
Hawaii's Kilauea volcano violently erupts; Good Samaritans in Texas rescue care home residents trapped in Hurricane Harvey's deadly floodwaters; in England a paddleboarder battles high winds and treacherous tides.

S1 E1 — Windows to Other Worlds: Fountain of Creation
How humans discovered the planets and how they became a complex solar system.

S1 E2 — Rocky Shores: Silent Partner
Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

S1 E3 — Borderland: Red Dawn
Earth's closest neighbor, the moon, is the cosmic stepping stone to a future with the planets.

S1 E4 — Lords of Gravity: Outer Limits
A fleet of spacecraft orbits, and sometimes lands on the surface of, Mars.

S1 E5 — Hidden Havens: Icy Gems
Jupiter, Saturn, Uranus and Neptune all have exotic atmospheres, liquid interiors and rings.

S1 E6 — Shooting Gallery: Galactic Visions
The history of the solar system might be preserved out in the dark domain of Pluto and beyond.

S4 E1 — The Milky Way
Exploring the Milky Way from the mythology of ancient sky watchers to how scientists are mapping it from the inside out.

S4 E2 — The Big Bang
Examining the science behind the birth of the universe.

S4 E3 — Hot Zone
Mercury, one of the nearest planets to earth, has eluded astronomers' best efforts to learn its secrets until missions like Mariner and Messenger.

S4 E4 — Cosmic Rays
Examining how cosmic rays are produced and what that can tell us about the universe.

S4 E5 — Fermi Paradox
The Fermi Paradox asks why another civilization has not presented itself.

S4 E6 — Landsat
Examining Landsat 8, the advanced planetary explorer with a 900 million dollar price tag, which is designed to reveal complex and ever-changing details undetectable by the human eye.

S5 E1 — The Curiosity of Mars
A vehicle the size of a small car spent a year on Mars.

An army of high-tech telescopes, led by Hubble in space, has delivered an unprecedented chain of discoveries about how galaxies took shape, how stars live and die, and how life arose.

States and corporations around the world are now investing in the field of asteroid mining activity.

S3 E7 — Volcano Eruption
A deadly volcano eruption causes catastrophic destruction, and a tornado flips cars on a highway.

S3 E8 — Maryland Flashfloods
Flash floods tear through Maryland in the US, a couple get stranded in a Himalayan blizzard, and a boat race is besieged by a rare weather phenomenon.

S3 E9 — Superstorm Sandy
Hurricane Sandy whips up wild waves in the Atlantic, prompting a rescue mission by the U.S. Coast Guard; cavers in California get caught out by flash floods; wild winds cause a crash for hot air balloonists; residents narrowly escape a landslide.

S3 E10 — Tornado Terror
A twister outbreak in Texas leaves a storm chaser trapped; in Florida, dangerous riptides drag swimmers out to sea; a sudden storm hits a holiday resort in Greece; a giant wave crashes through a restaurant in Italy.

S3 E11 — Nature Unleashed
The LA Fire Department battle to rescue residents trapped by the flames in California; the biggest twister to hit the US for 60 years rips apart Joplin, Missouri; in Antarctica, a husband and wife brave extreme elements to set a new record.

S3 E12 — Fearsome Flooding
Queensland, Australia is shaken by the most devastating flood in its history; in Kansas, two storm chasers track a terrifying twister; a base jumper gets stranded in freezing temperatures in Iceland; a destructive hail storm pummels Texas.

S3 E13 — Hawaii Volcano
Hawaii's Kilauea volcano violently erupts; Good Samaritans in Texas rescue care home residents trapped in Hurricane Harvey's deadly floodwaters; in England a paddleboarder battles high winds and treacherous tides.

S1 E1 — Windows to Other Worlds: Fountain of Creation
How humans discovered the planets and how they became a complex solar system.

S1 E2 — Rocky Shores: Silent Partner
Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

S1 E3 — Borderland: Red Dawn
Earth's closest neighbor, the moon, is the cosmic stepping stone to a future with the planets.

S1 E4 — Lords of Gravity: Outer Limits
A fleet of spacecraft orbits, and sometimes lands on the surface of, Mars.

S1 E5 — Hidden Havens: Icy Gems
Jupiter, Saturn, Uranus and Neptune all have exotic atmospheres, liquid interiors and rings.

S1 E6 — Shooting Gallery: Galactic Visions
The history of the solar system might be preserved out in the dark domain of Pluto and beyond.

S4 E1 — The Milky Way
Exploring the Milky Way from the mythology of ancient sky watchers to how scientists are mapping it from the inside out.

S4 E2 — The Big Bang
Examining the science behind the birth of the universe.

S4 E3 — Hot Zone
Mercury, one of the nearest planets to earth, has eluded astronomers' best efforts to learn its secrets until missions like Mariner and Messenger.

S4 E4 — Cosmic Rays
Examining how cosmic rays are produced and what that can tell us about the universe.

S4 E5 — Fermi Paradox
The Fermi Paradox asks why another civilization has not presented itself.

S4 E6 — Landsat
Examining Landsat 8, the advanced planetary explorer with a 900 million dollar price tag, which is designed to reveal complex and ever-changing details undetectable by the human eye.