Mythbusters alumnus Grant Imahara has passed away suddenly, according to Discovery. The television network confirmed the news on Tuesday, saying the BattleBots champion and current BattleBots judge was an important part of our Discovery family and a really wonderful man.We are heartbroken to hear this sad news about Grant, Discovery said in a statement. Ive been part of two big families with Grant Imahara over the last 22 years. Ive been part of two big families with Grant Imahara over the last 22 years. Grant was a truly brilliant engineer, artist and performer, but also just such a generous, easygoing, and gentle PERSON.