<P> Henry and Alice arrive home soon after only to learn of their son's disappearance . They then contact the authorities and his friends to start looking for him . George, now feeling intense guilt and remorse about all the times he's yelled at Dennis and what he had said, especially since he really had been robbed, joins in the search in his car, and everyone ends up looking for the five - year - old all night . Meanwhile, Dennis unintentionally but effectively defeats Sam by tying him up with a rope, setting him on fire twice, accidentally bludgeoning him several times, handcuffing him, and losing the key in a pot of baked beans amongst other things . He then returns to the Wilsons' house the next morning with an injured Sam in the wagon attached to his bike, having also recovered Mr. Wilson's gold coins . Sam is then taken into police custody by an amused sheriff who had advised him earlier to leave town . Dennis and George make amends, and both the Mitchells and the Wilsons become close friends on better terms . That night, Alice tells the Wilsons that she does not have to travel out of town anymore and will stay to work on local projects and Dennis can come to work with her since they have a day care center . George scoffs at this saying he and Martha will be happy to continue watching him, explaining that he's learned some things about children by saying to both Henry and Alice that kids are kids and they have to play by their rules, roll with the punches, and expect the unexpected . Around the same time, just as Dennis is still trying to get the flame out of his marshmallow, it lands on George's forehead . </P> <P> As the closing credits start to roll, Andrea, Alice's egotistical coworker, finds Dennis sitting near the copy machine as she comes in to use it . He asks to push the button on it, but she arrogantly tells him that he doesn't know what one to push . Sure enough, he pushes the "PRINT" one and runs off with other workers, including Alice, looking on . The paper feeder sucks up Andrea's scarf, her head gets pinned face down on the scanner bed, and the machine relentlessly flashes its blinding light in her eyes, repeatedly copies her face, and spews out page after page of black and white photos showing her various agonized facial expressions as she screams and cries on the scanner bed, eventually getting herself free . </P> <Ul> <Li> Mason Gamble as Dennis Mitchell, a mischievous 5 - year - old boy </Li> <Li> Walter Matthau as George Wilson, a neighbor and Martha's husband </Li> <Li> Joan Plowright as Martha Wilson, George's wife </Li> <Li> Christopher Lloyd as Switchblade Sam, a burglar </Li> <Li> Robert Stanton as Henry Mitchell, Alice's husband and Dennis' father </Li> <Li> Lea Thompson as Alice Mitchell, Henry's wife and Dennis' mother </Li> <Li> Amy Sakasitz as Margaret Wade, Dennis' friend </Li> <Li> Kellen Hathaway as Joey McDonald, Dennis' friend </Li> <Li> Paul Winfield as Chief of Police </Li> <Li> Ben Stein as Boss (only as a cameo shot at a meeting) </Li> <Li> Natasha Lyonne as Polly </Li> <Li> Devin Ratray as Mickey </Li> <Li> Hank Johnston as Gunther Beckman </Li> <Li> Melinda Mullins as Andrea </Li> <Li> Billie Bird as Edith Butterwell </Li> <Li> Bill Erwin as Edward Little </Li> <Li> Arnold Stang as the Photographer </Li> <Li> Jeannie Russell as Neighbor </Li> </Ul> <Li> Mason Gamble as Dennis Mitchell, a mischievous 5 - year - old boy </Li>

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