Question: Who is the Inspector Gadget's nemesis?

Context paragraphs:
Inspector Gadget (1983 TV series): Inspector Gadget is a French-Canadian-American animated comic science fiction television series that revolves around the adventures of a clumsy, dim-witted detective named Inspector Gadget—a human being with various bionic gadgets built into his body.  Gadget's nemesis is Dr. Claw, the leader of an evil organization known as "M.A.D." The series launched the "Inspector Gadget" franchise.

Inspector Gadget: Inspector Gadget is a media franchise that began in 1983 with the DIC Entertainment animated television series, "Inspector Gadget".  Since the original series, there have been many spin-offs based on the show, including additional animated series, video games and films.

Inspector Gadget: Mad Robots Invasion: Inspector Gadget: Mad Robots Invasion is a video game based on the television show of the same name.  The game was released for the PlayStation 2 in 2003 only in Europe.

Gadget &amp; the Gadgetinis: Gadget & the Gadgetinis is a Canadian–French-Italian TV series spin-off of the 1983 series "Inspector Gadget", developed by DiC Entertainment in cooperation with Haim Saban's SIP Animation and released 2001–2003.  There are 52 episodes.  "Gadget & the Gadgetinis" is today the property of DHX Media, which holds the rights to most of DiC's library.

Inspector Gadget 2: Inspector Gadget 2 (alternatively known as IG2, and credited as just Inspector 2 Gadget at the start credits) is a 2003 Australian-American live-action comedy film, released direct-to-video on VHS and DVD on March 11, 2003.  The film is based on the cartoon series created by DiC Entertainment and is a stand-alone sequel to the 1999 film "Inspector Gadget".  It was filmed in Brisbane, Queensland, Australia.

Inspector Gadget (blogger): Inspector Gadget is the pseudonym used by an anonymous British police officer, reportedly an inspector in a rural constabulary in the south of England, who wrote an influential blog, "Police Inspector Blog", between 2006 and 2013.

Inspector Gadget Saves Christmas: Inspector Gadget Saves Christmas is a Christmas television special, featuring characters from the cartoon series "Inspector Gadget".  The special was produced by DIC Entertainment and LBS Communications, Inc., and aired on NBC on December 4, 1992.

Inspector Gadget's Field Trip: Inspector Gadget's Field Trip (onscreen title: Field Trip Starring Inspector Gadget) is a spin-off incarnation of Inspector Gadget, produced by DIC Entertainment in 1996 and aired on the The History Channel, where it was rerun until 2000.  26 episodes mixing animation with live-action were produced.  Don Adams returned as the voice of Inspector Gadget.  The series was an educational travelogue program for children, in which the animated Gadget would show viewers the many different sites in famous cities around the world via live-action-clips with historical facts.  The theme song is slightly similar to the one in the Gadget Boy series.  In fact, Gadget Boy sometimes makes a cameo appearance in the show (e.g. St. Augustine, Florida episode).

Inspector Gadget: Mission 1 – Global Terror!: Inspector Gadget: Mission 1 – Global Terror!  is a graphic adventure game based on the animated television series "Inspector Gadget" and released for DOS in 1992.  In the game, Gadget is assigned a mission to rescue UN members who have been kidnapped and scattered around the world by his nemesis Dr. Claw.  Unlike other "Inspector Gadget" games, players do not have direct control over Gadget himself, but rather his niece Penny and their dog Brain, who must assist the clueless Gadget in his mission.

Inspector Gadget (film): Inspector Gadget is a 1999 American action-comedy film directed by David Kellogg, written by Kerry Ehrin and Zak Penn from a story by Ehrin and Dana Olsen.  It is loosely based on the 1983 animated cartoon series of the same name.  It stars Matthew Broderick as the title character, along with Rupert Everett as Dr. Claw, Michelle Trachtenberg as Penny, and Dabney Coleman as Chief Quimby.  Three new characters were introduced, Dr. Brenda Bradford (played by Joely Fisher), Mayor Wilson (played by Cheri Oteri) and the Gadgetmobile (voiced by D. L. Hughley).  The film tells the story of how Inspector Gadget and Dr. Claw came to be in the cartoon.

Supporting paragraphs: Inspector Gadget: Mad Robots Invasion Inspector Gadget (1983 TV series)
Answer: Dr. Claw