Unsealed: Alien Files - Second Skin

Seizoen: 4 - Aflevering: 1 / 86 - Eerst uitgezonden: 24 april 2015 - Episode ID: 1204547

Many experts believe aliens have visited the Earth for thousands of years, but if we can't survive space travel without a protective suit, how can they? Are some aliens mere shells or clones with an artificial consciousness?