Walter Matthau
Mr. Wilson
When his parents must go out of town on business, Dennis stays with Mr. and Mrs. Wilson. He is driving Mr. Wilson crazy, but he is just trying to be helpful, even to the thief who has arrived in town.
Mr. Wilson
Dennis Mitchell
Martha Wilson
Switchblade Sam
Alice Mitchell
Henry Mitchell
Margaret Wade
Joey
Chief of Police
Polly
Mickey
Gunther
Andrea
Edith Butterwell
Edward Little
Photographer
Boss
Gaggle Lady #1
Gaggle Lady #2
Gaggle Lady #3
Director
