Mine’s also x-files, but the cockroach wall one. I think it’s a much later season episode, scully may have been pregnant? But I have no interest in finding it. It gave me a roach phobia. And then when I was an adult, I learned in the south they are MUCH bigger than up north here, and they can fly, and I learned this because one flew into my apartment through the porch door and just crawled around on my wall by the lamp, and was extra horrified.