The Outer Limits
Season 2, Episode 7: The Invisible Enemy
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A manned mission to Mars is menaced by Martian creatures who swim in the planet's sandy soil.
All Episodes - Season 2
Episode 1
Soldier
Episode 2
Cold Hands, Warm Heart
Episode 3
Behold, Eck!
Episode 4
Expanding Human
Episode 5
Demon with a Glass Hand
Episode 6
Cry of Silence
Episode 7
The Invisible Enemy
Episode 8
Wolf 359
Episode 9
I, Robot
Episode 10
The Inheritors Part I
Episode 11
The Inheritors Part II
Episode 12
Keeper of the Purple Twilight
Episode 13
The Duplicate Man
Episode 14
Counterweight
Episode 15
The Brain of Colonel Barham
Episode 16
The Premonition
Episode 17
The Probe