The girls take matters into their own hands and try to put a stop to "A," but their problems are far from over.
When a lab tech is murdered in a case that has eerie similarities to a 1950's cold case, the CSIs get a glimpse into what goes on in the shadows of the lab. (TV-14)
The Red Cell team is asked personally by FBI Director Fickler to find the estranged daughter of a federal judge, who is his longtime friend.