A kidnapped child-genius reappears in his bedroom after being missing for six years.
A man's death is linked to his genetically engineered crop.
An American Indian ritual, a blood disease and an undiscovered species play a part in a series of deaths in a Seattle high-rise.
Turner joins a Defense Department team investigating a series of attacks on Washington, D.C.
While helping a Gulf War veteran clear his name, Turner discovers a cover-up at a nuclear power plant.
Turner believes an external force is responsible for an increase in road-rage incidents.
The death of a famous pianist is linked to a mysterious implant in his brain.
Turner reunites with a former mentor while investigating a possible viral outbreak.
Sydney thinks a homeless patient may have been forced into a radical experiment when she sees him scratching off his own skin.
Turner searches for two people that hold the key to a mass suicide in a rural town.
Turner investigates a scientist who develops a way to 'experience' death without actually dying himself.
A woman claims her doctor is trying to kill her unborn child.
While fighting his own degenerative disease, a scientist (Tim Guinee) uses his expertise against those who would abuse science.