Twenty years after two siblings witness and participate in the death of their mother's unusual boyfriend, the ghost of the victim comes back to seek a very plodding and slow paced revenge on the little brats that killed him. It's hard to blame him really. I mean, I don't know about you, but if I'd had my soul trapped in the mirror of a boring bedroom for two+ decades, I'd be pretty pissed too. 

This episode is also available as a blog post: http://randommoviemusings.com/2021/03/31/the-boogey-man-1980/