I saw the old
Outer Limits tv series the first time in 1978, when I was 15 years old, otherwise some of them might have given me nightmares too.
STAR TREK series, episode list
But I remember the first
Star Trek episode I saw, back in 1969, "The Man Trap" (episode 6), with the monster that takes the illusion of being human, and then puts its suction-cup hands on a person's face and absorbs all the salt out of their bodies, leaving red rings on their dead faces... man, that scared the crap out of me !
I thought the woman who played the monster in human disguise looked really creepy too. Very true to her role.
But her other disguise persona was hot !
http://www.sixtiescity.com/startrek/LOST/nancycrater2.jpg 
At six years old, I wasn't fully appreciative of that beauty. And of course, she's probably older than my grandmother now...
