Season 7 Episodes10
Cast2
Teller
Himself
Penn Jillette
Himself
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8.3
Lie Detectors
8.3/10 · 120 votesJul 23, 200930 min
Ranked #2 of 10 in Season 7•+0.8 vs season avg
Polygraphs are used in thousands of investigations and job screenings. Can a machine really detect whether someone is lying? Penn & Teller will meet people whose lives were ruined by the faulty tests.
Seasons8
Episode Summary
"Lie Detectors" is episode 5 of Penn & Teller: Bull! season 7. It scored 8.3/10 from 120 votes, ranking #2 of 10 episodes this season (season average 7.5). It aired on July 23, 2009.