Terry Lake is the team profiler in Season One, and a valued member of the group, trusted by Don Eppes. She strove to establish and define her place at the FBI, but was primarily support, in that somewhat similar to Charlie. However, she vanished without trace, save for an off-hand line in "Judgment Call" (S02E01), to be replaced by Megan Reeves.
Behind the scenes
Several parties have said that Sabrina Lloyd didn't really click with the other cast members.