Wolf 359 S2 E8
A bad episode.
shareThis is another one I actually love. I was initially rather bored with the '50s style and the boring couple but the concept was wonderful... even if the images to depict the microcosmic world were mostly poor and the "monster" (referred to by the crew as "the Plag" which I read was derived from "platex glove...) was not the most threatening image.
I used the basic story in a pulp era rpg in the '80s and recently adapted it to make one of my favorite Call of Cthulhu scenarios. I wrote it up in a few blog entries after the first run a few years ago -
http://skullhouse-rpg.blogspot.com/search?updated-max=2015-07-20T16:02:00-07:00&max-results=7&start=22&by-date=false
The July 20 and 24 posts conclude the description.