Dennis the Menace - Season 4 - Eps 36: First Editions
When Dennis takes his comic books over to show Mr. Wilson, Mr. Wilson writes an important phone number on one of the comics, So when Dennis leaves and takes his comic books Mr. Wilson spends all day looking for the comic book he wrote the phone number on.
About Dennis the Menace

Title: Dennis the Menace
First Air Date: 1959-10-04
Last Air Date: 1963-07-07
Status: Ended
Rating: 6.5/10 (from 31 votes)
Language: EN
Seasons: 5
Total Episodes: 146
Network: CBS
Genres: Comedy, Family
Production Companies: Dariell Productions, Screen Gems
Synopsis
This 1959-1963 television situation comedy series follows the lives of the Mitchell family, Henry, Alice, and their only child Dennis, an energetic, trouble-prone, mischievous, but well-meaning boy, who often tangles with his peace-and-quiet-loving neighbor George Wilson, a retired salesman, or, later, with George's brother John, a writer. Dennis is basically a good, well-intentioned boy who always tries to help people, but who winds up making situations worse – often at Mr. Wilson's expense.
Cast

Jay North
Dennis Mitchell

Gloria Henry
Alice Mitchell

Herbert Anderson
Henry Mitchell

Gale Gordon
John Wilson