Grant Masaru Imahara was an American electrical engineer, roboticist, television host, and actor whose inventive spirit and enthusiasm for science made him a beloved figure in popular entertainment. Born on October 23, 1970, in Los Angeles, California, he built a career that bridged the worlds of Hollywood visual effects and hands-on engineering, ultimately becoming one of the most recognizable faces in science programming through his long tenure on MythBusters.

Imahara's professional path began at Lucasfilm, where he worked in the THX division as an engineer before joining the company's visual effects arm, Industrial Light & Magic. At ILM, he contributed to a remarkable roster of blockbuster films, with his work appearing in franchises such as Star Wars, Jurassic Park, The Matrix, and Terminator. He also served as a chief model maker on the film Galaxy Quest. His first foray into television came on the robot combat series BattleBots, for which he designed and competed with a robot named Deadblow; he later returned to the program as a judge.

In 2005, Imahara joined MythBusters as a member of the Build Team, appearing in more than 200 episodes of the series until his departure in 2014. On the show, he designed, built, and operated numerous robots and machines used to test a wide array of myths, becoming known for his problem-solving skills and his willingness to put himself in harm's way for the sake of experimentation. Beyond MythBusters, he designed the animatronic "robot skeleton" Geoff Peterson to serve as a sidekick on The Late Late Show with Craig Ferguson in 2010. In 2016, he starred alongside his former MythBusters co-stars Kari Byron and Tory Belleci in the Netflix series White Rabbit Project.

Imahara also pursued acting, portraying Hikaru Sulu in all eleven episodes of the web series Star Trek Continues and playing Lieutenant Masaru in the 2015 movie Star Trek: Renegades. His combination of engineering expertise and on-camera charisma made him a sought-after figure in both the science and entertainment communities.

Grant Imahara died on July 13, 2020, at the age of 49, after suffering a ruptured intracranial aneurysm. His passing prompted an outpouring of tributes from colleagues, fans, and the broader scientific and entertainment communities, who remembered him for his ingenuity, generosity, and the infectious curiosity he brought to every project he undertook.