Shake the Bible

Season 2, Episode 1: "The Beantown Bailout"
In their attempt to take down the mob, Parker and Hardison pose as members of the clergy to sneak into the bank's secure vault system. Only Parker could make a nun's habit look that good (as Hardison so aptly – and awkwardly – points out). Besides finding out that Parker obviously isn't too religious, we find out that she's slowly understanding how to interact and deal with people a little better.