When several patients die mysteriously, hospital authorities and the police investigate sinister circumstances.

A rare genetic disease causes fatal insomnia.

After several patients arrive at the emergency room with strange infections, the CDC Disease Detectives are called to investigate.

A difficult-to-diagnose illness causes symptoms that mirror schizophrenia.

A doctor investigates whether a rare disease drove a beloved physician to commit a violent murder.

Doctors discover a shocking secret about a young mother dying of cancer.