The Twilight Zone (1985) : 1x15

A young boy becomes fascinated with the new neighbor next door. The neighbor, Mr. Bendictson, warns him that he cannot stay long, as he is a vampire! The boy is still intrigued, but soon finds out the truth. An alien ship arrives at the UN and the alien representative declares his disappointment at Earth's progress. The UN ambassadors plead for 24 hours to resolve their differences. In 24 hours the ambassadors manage to arrange world peace and nuclear disarmament. When the alien returns the ambassadors realize they have misunderstood him entirely. A young married couple discovers that their home is being remodeled by blue-clad workers who are workers of time that build and move objects from one time period to another.