 Martin creates an Ultrasonic Microcosmic Molecular Separator, a device that breaks objects down to their individual molecules - because the molecules are so small, the object is now invisible to the naked eye - and puts them back together. Det. Brennan zaps himself. While Martin and Tim are out in the garage momentarily, Mrs. Brown unknowingly vacuums up his molecules and throws them in the trash. Luckily, Martin is able to retrieve them all. But before Martin can put him back together, the police department starts an investigation on the missing Det. Brennan. However during the mêlée of the investigation, Martin and Tim lose one molecule and need to find it before they can put him back together again.