...
Part horror movie, part medical detective story, find out what happens when people fall prey to an infection from a parasite, those nasty microscopic creatures found in water, soil and even in the air. Victims' stories are retold, including how doctors and scientists attempt to unravel each case before it's too late. Biologist Dan Riskin, assisted by doctors and experts who witnessed each case, leads the scientific discussion about each parasite.
A young girl is brought to the hospital with stabbing pains in her scalp; a mother's mysterious symptoms threaten to tear a family apart; a deadly invader turns a relaxing vacation into a nightmare.
A man falls comatose; a college student has a sore throat; and a young woman's symptoms confound experts.
A man has something living in his eye; a young girl mysteriously falls ill; and a woman's bizarre symptoms push her to the brink of insanity.
An infant falls mysteriously ill; a biology professor becomes an unexpected host; and a family man is brought to the brink.
A new mother is in critical condition; a young boy has an ailment that no antibiotics can cure; and a young man has an invader in his brain.
A young boy has a strange condition; a woman's symptoms push her to madness; and a toddler falls into a trance-like state when something begins eating his brain.
A teenager develops mysterious blotchy sores; an athlete is hit by a rare infection; and a woman battles strange bouts of vomiting.
A man coughs up blood; a newlywed husband is struck down by a rare disease; and a father struggles with abdominal pain.
An infant is suddenly paralyzed; a father is infected with a monster that threatens to blind him; and a woman's excruciating pain confounds doctors.
A woman is struck down by a dangerous parasite; an infant falls mysterious ill; and a fungus brings a young man to the brink of death.
After a man hits his head, he's left fighting a one-on-a-million medical mystery; a boy's wounded knee becomes home to an uninvited guest; a man unwittingly feeds his own intended killer.
A man develops a strange growth on his wrist; a nurse finds twig-like pieces in her urine; and a pregnant woman falls ill with flu-like symptoms.
Christmas time is here, and these three victims each receive a monstrous gift. In Florida, a woman is out Christmas shopping when she suddenly feels a stabbing pain in her eye so severe that she believes she sees shadows of worms in her eye.
