: The unseen main antagonist and leader of the criminal organization M.A.D. He is always accompanied by his pet, M.A.D. Cat , and is known for his growling catchphrase: "I'll get you next time, Gadget! NEXT time!" .
: Gadget’s highly intelligent 10-year-old niece. She is the true mastermind who uses her high-tech Computer Book and Video Watch to solve every case behind her uncle's back. Inspector Gadget
: The protagonist, originally voiced by Don Adams (famous for his similar role in Get Smart ). He is brave and well-intentioned but consistently mistakes his allies for enemies and vice versa. : The unseen main antagonist and leader of
