3x9 - Maniac Mansion

The family is packing for a trip to Cape Scary, and go out to eat after they're done. A man in the restaurant who looks just like Fred pays his bill, and Fred gets weirded out. Later, Fred gets a call from this mysterious man who reveals himself as Remax Brady. Remax shows up at the mansion, so Fred, Tina and Casey develop a plan to get him out. While in the lab, Remax comes through the door and they see him in the camera Fred set up. They go upstairs to fight him, and the lights go out. After a big fight they eventually subdue him. They later find out Remax only wanted to get back at Fred for the time he accidentally received an award of his at camp.