This Kolchak: The Nightstalker episode has Darren McGavin chasing the boogeyman. Of course after a while it's the boogeyman chasing him. Some murders in and around a section of Chicago where a lot of Cajun folks from Louisiana have settled. People are being torn limb from limb or crushed in that area and always Spanish moss like you get from the swamp is around them.
This traces back to a sleep study program being conducted by Dr. Severn Darden with Donald Mantooth as the subject. As he dreams he conjures up Richard Kiel all 8 foot of him, unrecognizable except for his height as a boogeyman legend Cajun kids were taught to fear.
Best scene was when McGavin finds Spanish moss near his desk and he knows the big guy is out for him.
But of course he deals with it as you Carl Kolchak always does.