Page "Dennis the Menace (1959 TV series)" Paragraph 30

On the sitcom and in the comics, Dennis was basically a good well-intentioned boy who always was trying to help people, but wound up making situations worse-often at Mr. Wilson's expense.

In early episodes of the first season, far more disasters happened as a result of his actions than in later episodes.

The character of Dennis was slightly toned down by the sixth or seventh episode.