Dennis the Menace - S01EP19 Medieval Evil/Beaver-Mania/Say Uncle

After Dennis reads a medieval fantasy book, Dennis and Joey are sucked into a fantasy land similar to the book he read. They are charged by the Elvin King with defeating a wicked monster; The Boys go camping for the weekend in his father's boss's mother home. Dennis wishes to keep one as a pet; Mrs. Wilson leaves to spend the day at her nephew's. Leaving Mr. Wilson home alone. Dennis terrorizes Mr. Wilson with his remote controlled airplane. George gets hit on the head, he then thinks Dennis is his favorite nephew. He then takes Dennis and Joey out for a day of fun.