A Massachusetts EMT is shattered by a routine emergency call when she discovers that the victim is her son, and a tough guy is brought to his knees. S5/Ep3
A Christmas baby is born, but doctors find her brain was infected in utero. A woman thinks a worm is in her eye, and a man gets a nasty surprise after surgery. S7/Ep7
When three unsuspecting young families are thrown into a tailspin, they are shocked to learn of the tiny culprits wreaking havoc on their lives. S5/Ep2
A Christmas baby is born, but doctors find her brain was infected in utero. A woman thinks a worm is in her eye, and a man gets a nasty surprise after surgery. S7/Ep7
A Christmas baby is born, but doctors find her brain was infected in utero. A woman thinks a worm is in her eye, and a man gets a nasty surprise after surgery. S7/Ep7
Three women living in vastly different locales have one thing in common: they've become unwitting hosts to baffling and deadly terrors inside them. S5/Ep1
Three victims each receive a monstrous Christmas present, including a woman who feels a stabbing pain in her eye and apparently sees worm's shadows. S5/Ep4
A man develops a strange growth on his wrist. A nurse sees twig-like pieces in her urine. A pregnant woman falls dangerously ill with flu-like symptoms. S8/Ep12
Three victims each receive a monstrous Christmas present, including a woman who feels a stabbing pain in her eye and apparently sees worm's shadows. S5/Ep4
Three victims each receive a monstrous Christmas present, including a woman who feels a stabbing pain in her eye and apparently sees worm's shadows. S5/Ep4
A man bangs his head and fights a rare medical mystery. A wound in a boy's knee hosts an uninvited guest, and a man unwittingly feeds his own killer. S8/Ep10
An infant is suddenly paralysed. A young father grapples with a monster that threatens to blind him. Plus, a woman's excruciating pain confounds experts. S8/Ep9
A teenager develops mysterious blotchy sores. A tough athlete is hit by a rare disease that make him hallucinate. Plus, a woman battles strange bouts of vomiting. S8/Ep7
An infant suffers terrifying seizures. A biology professor in a strange experiment becomes an unexpected host. A family man is hit by thousands of parasites. S8/Ep6
A man falls comatose. A student's sore throat turns deadly, and the monster destroying him is shockingly common. A woman's bizarre symptoms stun experts. S8/Ep5
A man develops a strange growth on his wrist. A nurse sees twig-like pieces in her urine. A pregnant woman falls dangerously ill with flu-like symptoms. S8/Ep12
A boy is struck with a serious fever. A woman has bizarre symptoms that push her to the brink of madness, and a toddler falls into a trance-like state. S8/Ep4
A man develops a strange growth on his wrist. A nurse sees twig-like pieces in her urine. A pregnant woman falls dangerously ill with flu-like symptoms. S8/Ep12
A man develops a strange growth on his wrist. A nurse sees twig-like pieces in her urine. A pregnant woman falls dangerously ill with flu-like symptoms. S8/Ep12
A woman who recently gave birth is in a critical condition. A young man feels excruciating pain and doctors discover something has invaded his brain. S8/Ep3
An infant is suddenly paralysed. A young father grapples with a monster that threatens to blind him. Plus, a woman's excruciating pain confounds experts. S8/Ep9
A Christmas baby is born, but doctors find her brain was infected in utero. A woman thinks a worm is in her eye, and a man gets a nasty surprise after surgery. S7/Ep7
A teenager develops mysterious blotchy sores. A tough athlete is hit by a rare disease that make him hallucinate. Plus, a woman battles strange bouts of vomiting. S8/Ep7
A boy vomits his own fecal matter and a teenager contracts one of the most feared diseases on the planet. What monsters are hiding in the backyard? S7/Ep6
A teenager develops mysterious blotchy sores. A tough athlete is hit by a rare disease that make him hallucinate. Plus, a woman battles strange bouts of vomiting. S8/Ep7
A teenager develops mysterious blotchy sores. A tough athlete is hit by a rare disease that make him hallucinate. Plus, a woman battles strange bouts of vomiting. S8/Ep7
An infant suffers terrifying seizures. A biology professor in a strange experiment becomes an unexpected host. A family man is hit by thousands of parasites. S8/Ep6
A four-year-old boy has crippling pain, a student with a small cut verges on death, and a woman is driven to insanity by a monster in her own body. S7/Ep5
An infant suffers terrifying seizures. A biology professor in a strange experiment becomes an unexpected host. A family man is hit by thousands of parasites. S8/Ep6
An infant suffers terrifying seizures. A biology professor in a strange experiment becomes an unexpected host. A family man is hit by thousands of parasites. S8/Ep6
A man falls comatose. A student's sore throat turns deadly, and the monster destroying him is shockingly common. A woman's bizarre symptoms stun experts. S8/Ep5
A man breaks out in a mysterious painful rash. A woman suffers bouts of piercing pain in her throat, and a teen is hit by unexplained dizziness and fatigue. S7/Ep4
A man falls comatose. A student's sore throat turns deadly, and the monster destroying him is shockingly common. A woman's bizarre symptoms stun experts. S8/Ep5
A man falls comatose. A student's sore throat turns deadly, and the monster destroying him is shockingly common. A woman's bizarre symptoms stun experts. S8/Ep5
A boy is struck with a serious fever. A woman has bizarre symptoms that push her to the brink of madness, and a toddler falls into a trance-like state. S8/Ep4
A family's cruise ship holiday becomes a nightmare when their toddler swallows a sinister monster. Plus, a mother of two is plagued with a mysterious infection. S7/Ep3
A boy is struck with a serious fever. A woman has bizarre symptoms that push her to the brink of madness, and a toddler falls into a trance-like state. S8/Ep4
A boy is struck with a serious fever. A woman has bizarre symptoms that push her to the brink of madness, and a toddler falls into a trance-like state. S8/Ep4
A woman who recently gave birth is in a critical condition. A young man feels excruciating pain and doctors discover something has invaded his brain. S8/Ep3