"Unseen of the Crime" is the 1st episode of the second season of Gadget and the Gadgetinis.
At the Young Inventors Expo, Penny unveils her latest invention, (the Gadgetinis were her entry the previous year) a DNA tracker which can find anyone. Her friend Shawn shows off his invention, an invisibility spray and is abducted by M.A.D. agents since Claw thinks the sprayer could be useful. While Gadget and the Gadgetinis are stumbling around, Penny finds Shawn, but she gets herself trapped in the M.A.D. lab. So the two young geniuses have to work together to escape.