Main Characters Narrator 273 main appearances Adam Savage 10 main appearances Jamie Hyneman 10 main appearances Folklorist 7 main appearances Kari Byron 5 main appearances Brian Louden 5 main appearances Jon Lung 5 main appearances Grant Masaru Imahara 3 main appearances Tory Belleci 3 main appearances Builder Shop Assistant Retired FBI Agent Host
Recurring Guest Characters Kari Byron 1 guest appearances Tamara Robertson 2 guest appearances Allen Pan 2 guest appearances Princess Leia 1 guest appearances Michael Rooker 1 guest appearances Forensic Sketch Artist 1 guest appearances Show Dog Judge 1 guest appearances Beauty Pageant Judge 1 guest appearances Shirley Eaton 1 guest appearances