When she fears the job is changing her
But in "House on Fire" (Season 4, Episode 19), she worries that her job within the BAU is causing her to lose faith that people are inherently good. Hotch (Thomas Gibson) reassures her by thanking her for her hard work, and by letting her know that he never wants her to change. Hold on to that giggle with all your might, Garcia!
Watch Criminal Minds on CBS.