Liar

Horizon presents a documentary that reveals the role played by deception in society and the effort by science to weed out the truth and the controversy over the accuracy of the polygraph test.

Other episodes for this season

Tibet - The Ice Mother
Episode 1 - Tibet - The Ice Mother
Russia's Deep Secrets
Episode 2 - Russia's Deep Secrets
Bones of Contention
Episode 3 - Bones of Contention
Siamese Twins
Episode 4 - Siamese Twins
Too Big Too Soon?
Episode 5 - Too Big Too Soon?
Farewell Fantastic Venus
Episode 6 - Farewell Fantastic Venus
Exodus
Episode 7 - Exodus
The Betrayers
Episode 8 - The Betrayers
Icon Earth
Episode 9 - Icon Earth
The I-Bomb
Episode 10 - The I-Bomb
Foetal Attraction
Episode 11 - Foetal Attraction
Cracks in the Crust
Episode 12 - Cracks in the Crust
Hearing Voices
Episode 13 - Hearing Voices
Liar
Episode 14 - Liar
The Human Laboratory
Episode 15 - The Human Laboratory
Nanotopia
Episode 16 - Nanotopia
Hunt for the Doomsday Asteroid (Update)
Episode 17 - Hunt for the Doomsday Ast...
A Code In The Nose
Episode 18 - A Code In The Nose
AIDS: Behind Closed Doors
Episode 19 - AIDS: Behind Closed Doors
The Runaway Mountain
Episode 20 - The Runaway Mountain