They're undeceivable.
The world's leading deception researcher, Dr. Cal Lightman, studies facial expression, body language and tone of voice to determine when a person is lying and why, which helps law enforcement and government agencies uncover the truth. But his skills also make it easier for him to deceive others.

The Truth About Lies (Episode 1)
Runtime: 26 min
Overview: Season 1 featurette.

Deleted Scenes (Season 1) (Episode 2)
Runtime: 20 min
Overview: Season 1 featurette.

Deleted Scenes (Season 2) (Episode 3)
Runtime: 21 min
Overview: Season 2 featurette.

Gag Reel (Season 2) (Episode 4)
Runtime: 4 min
Overview: Season 2 featurette.

Dr. Ekman / Dr. Lightman - Lie Detection Tutorial (Episode 5)
Runtime: 23 min
Overview: Season 2 featurette.

Eli Loker - Honest Man (Episode 6)
Runtime: 5 min
Overview: Season 2 featurette.

Deleted Scenes (Season 3) (Episode 7)
Runtime: 6 min
Overview: Season 3 featurette.

In Character with Tim Roth (Episode 8)
Runtime: 4 min
Overview: Season 3 featurette.