A secret about Gillian's past is uncovered on the episode "Sweet Sixteen." This clips gives us an idea of what that is.
Watch the full episode of Lie To Me's "Beat the Devil" which returned to FOX.
This is the official Fox promo for "Honey." Garrett Dillahunt guest stars on the episode.

Lie to Me Quotes

Martin Walker: A good chess player thinks five moves ahead.
Cal Lightman: Great chess players only think one move ahead, but it's always the right move.

Weil: You haven't done enough muck-raking for one day?
Ria: Sir. We don't think you were doing anything sexual at that club, because, I believe this escort, Melissa, who you paid for time with-
Weil: What about her?
Ria: She's your daughter.