NASA's Unexplained Files

A recently declassified letter written by President Kennedy demands that the CIA share their UFO data with NASA.

Jupiter is far hotter than it should be, and scientists don't understand why. The Curiosity Rover finds something strange on Mars that could it be a lost spacecraft or something far more sinister. Detectives turn to NASA for help with a murder cold case.

Two suns photographed in the sky over Indonesia may be the first sighting of our sun's evil twin. Then, NASA scientists are baffled by ghostly swirls on the moon's surface, and an astronaut disappears during his return to Earth.

An astronomer records an unusual radio signal from beyond our solar system. Then, when scientists discover strange DNA in the octopus, they examine if their origins could be alien.

When NASA spots something on Mars that resembles Stonehenge, they investigate what could have made this structure. Then, scientists discover a mysterious hole in Saturn's rings, and an ancient tribe claims contact with aliens.

The CIA hatches a secret revenge plot when the Soviet Union unveils its own space shuttle. Then, recent discoveries shed new light on Sodom and Gomorrah, and a missing nuclear weapon could threaten an Arctic NASA base.

The last humans to walk on the Moon discover something strange on the lunar surface. Then, a scientist investigates a phenomenon responsible for horrific mass deaths, and a NASA mission threatens an American hero's reputation.

A mysterious object orbiting Saturn looks just like the Death Star. Then, new evidence might shed light on the mysterious death of the first man in space, and a missing cutting-edge satellite escalates fears of a space war.