Hey there Kindertrauma,
Long time listener, first time caller.
I remember from my youth, probably when I was 8 or 9, which would make it 1978 or 9 a rerun of a '50s or '60s anthology series. I don't remember which one, I don't think it was the Outer Limits but I DO remember my mother warning me not to watch lest I be scared, but of course I did anyway.
I recall it being black and white, about a group of disparate passengers on some sort of spacecraft in the near future and an alien sort of life form represented as a what looked like a slug made of light beamed upon people as it brought back traumatic feelings from their past.
Sound familiar anyone?
-Greg of the THE TROUTCHIVES.