In Fontana, California, a man. is suddenly struck by two mystifying symptoms - a swollen face and yellow eyes. Doctors tell his father that a powerful infection is raging throughout his son's body, shutting down his organs.
In Arlington, Texas, a 7 year old budding baseball star might be playing his last game when a rare and mysterious infection takes over his brain. Suffering violent and uncontrollable seizures, the situation leaves his parents traumatized. Will he make it?
The Rauch family dodges a bullet when their prematurely born child Emmet survives for a year. But when he mysteriously coughs up blood, doctors are shocked to find a modern monster destroying his fragile body from within.
A young mother is expecting her second child when she suddenly is hit with a devastating infection that leaves her in a coma. Will she and her baby survive? Then a young woman in Texas discovers that her lungs are filled with parastitc worms.
A pregnant teacher is blindsided by excruciating bouts of diarrhea, and to her horror she soon finds blood in the toilet. Can doctors find the invader, and save her baby's life before it's too late? Then, a truck driver nearly goes blind from a parasite.
In Oregon, something inexplicable is driving auto specialist Chris Jones to madness. After two years of constant coughing and uncomfortable insomnia, he soon believes that death will be his only respite. Will his doctors uncover the monster inside him?
Three people must stand before the face of death. One is a toddler from Ohio, who stops eating and suffers bizarre salt cravings. When her parents realize she's no longer growing, doctors are puzzled. What could be lurking inside her?
A successful model's first steps into motherhood run her straight into a web of blood, pain and sheer terror. What lurking menace could take this woman to the brink of suicide?
A young newlywed suffers horrific seizures, and inexplicable delusions that transform this perfectly healthy woman into a complete basket case. Will her doctors be able to tease out the monster hijacking her body? Then, a man loses 50lbs from a parasite.
An adventurous traveler, Adam Spencer takes an epic six month trip across South America but returns home with an unwanted monster... a mysterious infection that is devouring his face. Will doctors be able to identify this disfiguring monster?
This season on Monsters Inside Me, a pregnant teacher falls sick and finds out her baby has stopped growing, an eight year old boys leg muscles are being ripped apart from the inside, and a truck driver is experiencing strange black spots in his field of vision. These illnesses are caused by parasites and the patients doctors are racing to find a cure before it's too late.
A 45 year old factory worker begins to go blind. Doctors suspect tuberculosis, until they realize he's infected with a deadly parasitic killer. Then, a local restaurant triggers a massive outbreak involving a particularly sinister parasite.
After a biopsy of her intestine, doctors find thousands of silent monsters living in a mother's tissue, but she's never left the country. Three stories of parasitic infection with one thing in common. They're all native to America!
A California man investigates hookworms as a way to cure his allergies, but there is just one problem no lab is willing to sell him any. You won't believe his radical action taken and the effect it has. Then an unseen bloodsucker gets into a writer's nose.
An 8 year old girl begins having daily stomach cramps, when the stomach pains become unbearable, a stool sample reveals that she's become a living refuge for a host of some of some of the most common parasites in nature.
An Iraq war veteran wakes in the middle of the night with an uncontrollable urge to relieve himself, and he heads for the bathroom. The foot-long worm he pulls from inside him will change his life forever.