Every season of Deadly Intelligence ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Deadly Intelligence!

CIA Drug Conspiracy

Tesla's Last Secret

Anthrax Killer: FBI's Unsolved Mystery

The Genius Who Loved Satan

Saddam's Doomsday Conspiracy

Enemy of the State

Nazi Revenge Mystery

Soviet Assassination Plot

A new Science Channel series explores the suspicious deaths of scientific geniuses to determine if their demises were unfortunate coincidences or if these gifted minds were murdered for knowing too much.

The Best Seasons of Deadly Intelligence

Season 1