Dr. Claw

Claw is arrogant, greedy, malicious, ruthless, callous, sinister, short-tempered, sadistic, and a major threat to all of Metro City. He is a psychotic criminal mastermind that will stop at nothing to destroy Inspector Gadget and take over the world. Most of his plots consist of terrorism and global attacks. Even though he is an evil mastermind, and a certainly menacing psychopath, he thinks Gadget's stupidity is an act to mock him and views him as his worst enemy, and has no idea that Penny and Brain do all the real work. As revealed in the first live-action film, he lost his left hand in a accident, giving him a mechanical claw. In Gadget and the Gadgetinis, it is shown that he has had his claw since he was a baby, so he probably lost his arm when he was young or he was born without his right arm. He is usually at a computer terminal where he monitors his various schemes, often in a creepy old castle. Although he's aware of Gadget's idiocy, he believes the Inspector to be his greatest enemy, never realizing that it is actually Penny and Brain who foil his plots in each episode (although he or his M.A.D. agents have captured Penny and her computer book and he has jammed her watch and sometimes Brain a number of times). He is usually seen with his fat pet cat M.A.D. Cat, who reaps the benefits of his brief victories and bears the brunt of his defeats. Claw's catchphrase at the end of every episode is, "I'll get you next time, Gadget! NEXT TIME!!!".

Dr. Claw always intends to do what he can to achieve wealth or world domination, not to mention eliminating his arch nemesis Inspector Gadget. However, his plans tend to constantly backfire when his men get arrested, or by Gadget, Penny, or Brain interfering with his plans.