Trivia
- His fashion sense resembles that of Inspector Clouseau from the Pink Panther cartoons. Also, in the pilot episode, Gadget had a mustache that was similar in appearance to Clouseau's. This was soon removed to avoid being sued by MGM.
- Inspector Gadget's mannerisms also appear to draw on the character of Maxwell Smart, portrayed by Don Adams in Get Smart.
- In the live-action film, Gadget worked in Riverton, Ohio as a security guard named John Brown who tried unsuccessfully on a few occasions to apply to the police academy. It was only after getting critically injured at the hands of Claw and converted into a cyborg that he was admitted into the police force.
- Gadget almost always wears the same trench coat, gloves, and hat at all times. But on very rare occasions, he has been shown to wear other outfits on his leisure time.
- In the cartoon, Gadget's real name was never revealed, but it was strongly implied that his real last name was Gadget. In the live-action film, his real name was John Brown.
- In the original cartoon, he was given his gadgets by Professor Von Slickstein. In the live-action film, it was Brenda Bradford. In Gadget Boy & Heather (which was believed by many to be about Gadget as a child), Gadget was converted to a cyborg by Myron Dabble. On a trading card, he is revealed to have had his accident from slipping on a banana peel. Other than that, his origins were never revealed.
- His, Penny Brown, and Brain's appearances in the Stephen Squirrelsky and Friends' movie spoof travels are Simba (Shrek), The Great Hedgehog Detective, The Sword in the Stone, Vanellope Von Schweetz, The Train and the Boat, Toon Age, Hoodwinked!, The Rescuers, Nikki's Adventures of Sing Along Songs Episode 4, The Rescuers Down Under, The Secret of NIMH, Nikki's Adventures of Sing Along Songs Episode 6, Skunkules, Home on the Range, Kermit's Winter Wonderland, The Little Jungle Boy, Kermiladdin 2: The Return of McLeach, AiAi the Monkey and A Day for George, The Reindeer and the Deer, Animal Story 2, AiAi the Monkey's Grand Adventure: The Search for Tails, A Cartoon Character's Life, Nikki's Adventures of Sing Along Songs Episode 7, Here Comes Winnie the Pooh, Animals, Inc, Simba 2, and Miss Bianca and the Bernard 2: Fievel's Adventure, FernGully: The Last Rainforest, A Pooh in Central Park, Bubblesrella 2: Dreams Come True, The Brave Little Piglet, Kung Fu Owen, Nikki's Adventures of Sing Along Songs Episode 8, The Thomas O'Malley Movie, Kermit Returns, Fievel the Red Nosed Mouse and The Island of Misfits, and Nikki's Adventures of Sing Along Songs Episode 9 and will even be in more spoof travels.