Creator	Bio	Role	# of Episodes
Dr. Karl Kruszelnicki	"Dr. Karl Kruszelnicki AM (/ˌkrʊʃəlˈnɪtski/ KRUUSH-əl-NIT-skee), often referred to as "Dr. Karl,...	Host	1104
Dr. Chris Smith	"Dr. Chris Smith is a consultant virologist, lecturer based at Cambridge University, science rad...	Host	1104
Kat Arney	"Katharine Luisa Arney is a science communicator, author, and harpist. She is a regular co-host ...	Host	1104
Chris Hadfield	"Chris Austin Hadfield is a retired astronaut, engineer, and former Royal Canadian Air Force fig...	Guest	1
Chris van Tulleken	"Chris van Tulleken is an infectious diseases doctor at the Hospital for Tropical Diseases. He i...	Guest	1
Dr. David Baker	"Dr. David Baker is an American biochemist and computational biologist."	Guest	1
Bill Nye	"Popularly known as Bill Nye the Science Guy, Bill is an American science communicator, televisi...	Guest	1
Jocelyn Bell Burnell	"Dr. Dame Susan Jocelyn Bell Burnell is an astrophysicist credited with "one of the most signifi...	Guest	1
Matt Parker	"Matthew Parker is an author, comedian, YouTube personality, and communicator."	Guest	1
Marc Abrahams	"Marc Abrahams is the editor and co-founder of Annals of Improbable Research."	Guest	1