Dennis the Menace Season 2 Episode 5 The Stock Certificate ( Air Date 1960-10-30 ) Genre Comedy, Family category. Overview "Mr. Wilson has a stock certificate worth $500. He hides it in his Phone book, however when Dennis brings him in his new phone book Mr. Wilson goes crazy and ends up going to the warehouse where all the old phonebooks are taken to look for his old phone book because he thinks the stock is still in it.".