The show was great . It would have cost them an extra 10, 000 bucks each episode to film in color, so they went with black and white.
It had a great following until Batman came out in full color and twice a week . It' s what killed the Munster off.
The cult status came from it being re-run alot and new people getting to see it.
You can look up on You Tube and see the un aired color pilot.