Creator	Role	# of Episodes
Tom Scott Thomas Scott is a British entertainer, educator, YouTuber, web developer and for... more	Host	82
Julie Hassett Julie Hassett is a producer and editor at HeadStuff. She has a BA in Film and Sc... more	Editor	83
Sabrina Cruz Sabrina Cruz is a Canadian YouTuber best known for posting videos on her main ch... more	Guest	7
Becky Stern Becky Stern is an American DIY expert. Her work combines basic electronics, text... more	Guest	3
Anna Ploszajski Anna Ploszajski is a materials scientist, engineer, and writer. Her book, Handma... more	Guest	2
Nicholas J. Johnson Magician, author, educator.Cat Fancier. Dog Fanciest.	Guest	2
Brian David Gilbert Brian David Gilbert is an American writer, actor, musician, and video producer.... more	Guest	2
Evan Heling Evan Heling is an American YouTuber, known for his DIY projects with his wife Ka... more	Guest	2
Hayley Loren Hayley Loren is an award winning engineer, presenter, and STEM career coach, wit... more	Guest	2
Lily Hevesh Lily Hevesh is an American domino artist and YouTuber.	Guest	2
Hannah Fry Hannah Fry is a British mathematician, lecturer on the Mathematics of Cities, te... more	Guest	2
Mike Boyd Mike Boyd is a Scottish YouTuber who creates vlogs where he attempts to learn a ... more	Guest	1
Ella Hubber Ella has a PhD in cell therapies and regenerative medicine from King’s College L... more	Guest	5
Mehdi Sadaghdar Mehdi Sadaghdar is also known on YouTube as ElectroBOOM, is an electrical engine... more	Guest	2
Shawn Brown Shawn Brown is a presenter and inventor at Kids Invent Stuff. He is an award-win... more	Guest	3
Toby Hendy Toby Hendy is a science communicator and YouTuber who focuses on educational con... more	Guest	2
Xyla Foxlin Xyla Foxlin is an American engineer, entrepreneur, and YouTuber.	Guest	1
Jeremy Fielding Jeremy Fielding is a YouTuber who focuses on mechanical engineering and educatio... more	Guest	2
Jade Tan-Holmes Jade Tan-Holmes is the creator and host of the science YouTube channel Up and At... more	Guest	2
Julian O'Shea Julian O'Shea is a social entrepreneur, humanitarian engineer and advocate for i... more	Guest	2