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• S20.E1 ∙ The Hunt for Saddam's Secret Weapons
• S20.E2 ∙ Can Bombing Win a War?
• S20.E3 ∙ The Deadly Deception
• S20.E4 ∙ Nazis and the Russian Bomb
• S20.E5 ∙ In the Path of a Killer Volcano
• S20.E6 ∙ Can Science Build a Champion Athlete?
• S20.E7 ∙ Diving for Pirate Gold
• S20.E8 ∙ Murder, Rape and DNA
• S20.E9 ∙ The Lost Tribe
• S20.E10 ∙ The Nova Quiz
• S20.E11 ∙ Wanted: Butch and Sundance
• S20.E12 ∙ Secrets of the Psychics
• S20.E13 ∙ Dying to Breathe
• S20.E14 ∙ Shadow of the Condor
• S20.E15 ∙ The Real Jurassic Park
• S20.E16 ∙ Roller Coaster!
• S20.E17 ∙ Mysterious Crash of Flight 201
• S20.E18 ∙ Great Moments from Nova
• S20.E19 ∙ The Best Mind Since Einstein
• S20.E20 ∙ Stranger in the Mirror