Dennis the Menace: Dinosaur Hunter is a live-action telefilm directed by Doug Rogers and starring Victor DiMattia as Dennis Mitchell and William Windom

William Windom (actor)

William Windom is an American actor. He is perhaps best known for his work on television, including several episodes of The Twilight Zone; playing the character of Glen Morley, a congressman from Minnesota like his own great-grandfather and namesake in The Farmer's Daughter; the character of John...

 as Mr. Wilson. It first aired on television in 1987, but wasn't officially released otherwise until 1993, due to the popularity of the 1993 film Dennis the Menace

Dennis the Menace (film)

Dennis the Menace is a 1993 live-action American family film based on the Hank Ketcham comic strip of the same name....

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Plot

Dennis and his friends find a dinosaur bone in his backyard, dubbed by him as the "Dennissaurus". The discovery makes life miserable for everyone, as scientists, reporters, and amusement park operators overrun the neighborhood.