6 Seasons
S4 E2

The Black Hole Next Door

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger this cosmic monster poses to Earth, and what would happen if it ever entered our solar system.

Seasons

Episode   1

Saturn's Moon Monsters

Episode   6

Secrets of the Alien Signals

Episode   7

Planet of the Metal Aliens

Episode   8

Did Aliens Nuke Mars?