Lie to Me, Season 1

Ria Torres:
Yesterday he was watching some video of an old British woman when I walked into his office.

Eli Loker:
Brown hair? About 40?

Ria Torres:
Yeah.

Eli Loker:
Lightman probably spent about a thousand hours watching that film. Her name was Louise Mason. She was a patient of one of Lightman's professors when he was in grad school. She had been in the psych ward about a month when that was recorded. She told the professor she was fine. No one could see she was actually in agony. Lightman finally got the idea to slow down the film and that's when he saw the agony on her face. That's what led him to discover microexpressions in the first place.

Ria Torres:
Well, I hope they didn't let that woman off the psych ward.

Eli Loker:
Well, she got a pass home for the weekend and killed herself. They didn't know to look for microexpressions then. Nobody knew they existed.