6 Seasons
S4 E3

Aliens vs. Stalin at Area 51

When a former Area 51 insider alleges that the Roswell UFO incident was a nefarious Soviet conspiracy masterminded by Stalin, experts investigate if it was indeed an enemy plot against America -- or if the confession is just another cover-up.

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?