Grant Masaru Imahara was an American electrical engineer, roboticist, and television host. He was best known for his work on the television series MythBusters, on which he designed, built and operated numerous robots and machines to test myths over the course of the show.

MythBusters is a science entertainment television program, developed by Peter Rees and produced by Australia's Beyond Television Productions. The series premiered on the Discovery Channel on January 23, 2003. It was broadcast internationally by many television networks and other Discovery channels worldwide. The show's original hosts, special effects experts Adam Savage and Jamie Hyneman, used elements of the scientific method to test the validity of rumors, myths, movie scenes, adages, Internet videos, and news stories.