THINGS YOU DON’T SEE follows a family, their closest friend, and the people whose lives shape the story behind radon, geology, and the hidden questions beneath everyday homes.
Environmental Geophysicist
Thoughtful, analytical, and quietly driven. Alex sees patterns other people miss and often turns everyday conversations into deeper questions about homes, geology, and radon.
Wife · Sharp Observer
Warm, witty, and emotionally grounded. Rachel is often the first to turn Alex’s serious explanations into something human, funny, and surprisingly revealing.
Neighbor · Friend
Curious, skeptical, and unintentionally hilarious. Tom asks the questions many viewers are already thinking, which makes him the perfect spark for each episode’s conversation.
Son
Bright, observant, and quietly curious. Ethan represents the next generation — always watching, listening, and beginning to understand the world Alex is trying to explain.
Daughter
Gentle, expressive, and full of presence. Lily adds warmth to the Carter family dynamic and makes the home feel lived-in, personal, and emotionally real.
The Legacy Behind the Story
A quiet but powerful presence in Season Three. His notes, instruments, and unfinished questions form the emotional and scientific legacy that continues to shape Alex’s path.
From everyday family life to deeper questions about radon, geology, and what lies beneath a home, each character helps reveal a different part of the story.
An ordinary family. Invisible questions. And a geophysicist who always wants more data.
Follow Alex, Rachel and Tom as everyday moments turn into stories about radon, homes, soil, geology — and the invisible forces beneath everyday life.
10 Episodes · Complete
10 Episodes · Complete
Same rain. Same street. But every home can still tell a different radon story.
What’s underneath.
— ALEX CARTERIndoor radon levels can be influenced by multiple factors, including soil and geology, pressure differences, foundation pathways and building conditions. Regional clues provide context, but measurements inside the home show what is actually happening there.
The house is only half the story.Start from the beginning or jump into Season Two. Follow Alex, Rachel and Tom as everyday moments turn into stories about radon, homes, soil, geology — and the things you don’t see.
Meet the Carter family — and the invisible questions hiding inside an ordinary home.
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EP09
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FINALE
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The questions move underground — into soil, geology and the forces beneath every home.
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EP02
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EP03
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EP04
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EP05
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EP06
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EP07
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EP08
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EP09
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FINALE
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