No joke Mythbusters made me think more critically when I was a lad. The amount of myths I believed as hard fact they shattered for me was instrumental to me being a grumpy fuck about every rumour I’ve heard since.
They're probably thinking of Grant Imahara and/or Jessi Combs who died in 2020 and 2019 respectively. They were both on the show for periods of time but not quite as well known as Jamie and Adam