From season 3 of The New Adventures of Superman:
Daily Planet boss Perry White invites the staff for an outing at his country farm, unaware that the ancient well houses a malevolent spirit, Mr. Mist, who covets Lois Lane as his bride. Mist uses unworn clothing to adopt his disguises, but Superman foils him every time.
The complete story can be found on DVD, as the final two seasons were released over the summer.
Creepy? Yep. Pedestrian, too.