S4 E1 • Pluto's Stranger Things

Evidence of alien technology around a distant star; speculation about Pluto's surface; Apollo astronauts are at a loss of words to describe an object they encountered while they approached the moon. Science Channel has named this episode the first episode of season 4.

Première diffusion : 30 août 2016

S4 E2 • Rise of the Planet Killer

A mars mission captures an image of a strange structure on the planet; an intriguing sight on the dark side of the moon; a planet-eating star gives scientists a peek of Earth's bleak future.

Première diffusion : 6 septembre 2016

S4 E3 • A President's Close Encounter

The discovery of geysers on a moon; NASA's mission to detect life; an object is spotted approaching an asteroid.

Première diffusion : 13 septembre 2016

S4 E12 • When the Universe Attacks

In the Bermuda Triangle of Space, a mysterious energy attacks NASA craft in earth's orbit; witnesses report terrifying encounters with eerie spheres of light.

Première diffusion : 7 juin 2016

S4 E4 • The Earth Next Door

Astronomers notice a planet in Earth's vicinity capable of supporting life; top secret military program exposed; the moon contains the components to start life.

Première diffusion : 20 septembre 2016

S4 E5 • Curse of the Full Moon

Cosmonauts are trapped in a capsule in a frozen lake; a NASA scientist investigates the Hindenburg; the full moon affects experiments.

Première diffusion : 27 septembre 2016

S4 E6 • Did Earth Have Two Moons?

A discovery suggests the hellish clouds of Venus may be the origin of life on Earth. A bizarre sighting 2,000 years ago raises the possibility that Earth once had two moons. A scientist helps the FBI crack the 1996 Olympic bombing.

Première diffusion : 4 octobre 2016

S4 E6 • Horror in the Cosmos

A strange object causes a massive shadow on the surface of Mars' largest moon; and an oddity on one of Jupiter's moons.

Première diffusion : 21 juin 2016

S4 E7 • Mystery of the Invisible Planet

A probe carrying a message to aliens malfunctions as it enters deep space. A NASA mission goes disastrously wrong when an imposter breaches Mission Control. Astronomers may have found an invisible planet around a distant star.

Première diffusion : 11 octobre 2016

S4 E8 • Mars's Deepest Secret

Soviet photos of the moon are intercepted by the CIA; a malfunction aboard the ISS, which imperils the whole crew; NASA probe finds evidence of the possibility of life on Mars.

Première diffusion : 18 octobre 2016