Unsealed: Alien Files

Season 3 Episode 13: Earth Portals

Experts have long believed the universe to be riddled with mysterious portals - shortcuts through space that allow travelers to span vast distances in the blink of an eye. From mighty volcanoes to secret underground civilizations.

Genre:

Documentary, Reality

Seasons:

4

Episodes:

82

Quality:

HD

Status:

Returning Series

First Air:

2012

IMDb:

6.9