Season 2 begins with two major additions to Don's FBI team and one surprising subtraction. Joining the L.A. bureau are psychological profiler Megan Reeves (Diane Farr) and agent Colby Granger (Dylan Bruno). Departing is Terry Lake (Sabrina Lloyd), who is reassigned to Washington, D.C. Megan and Colby are quickly thrown into action when a judge's wife is gunned down in her garage. Since she was driving her husband's car, it's unclear whether she or her husband was the intended target. Charlie (David Krumholtz) continues to help Don (Rob Morrow) investigate cases, but when a rival theoretician, Marshall Penfield (Colin Hanks), challenges Charlie's most famous work and states that it is flawed, it forces him to reevaluate his life, specifically whether he should devote more time to his career and less with the FBI. Also, a shooting at FBI headquarters leaves Charlie severely shaken. Back at home, Alan (Judd Hirsch) opens his own consulting business and begins dating again. As for Larry (Peter MacNicol), he sells his home and embraces a nomadic lifestyle, sometimes sleeping in his car or in his office. He also becomes attracted to Megan and they embark on a friendship that turns romantic. Charlie's relationship with Amita (Navi Rawat) is threatened when she is offered a position at Harvard as an assistant professor. It is further endangered when Charlie's ex-girlfriend (Sonya Walger) arrives from London on a book tour and their relationship heats up faster than either of them anticipated. Charlie also struggles with the past and dreams about his deceased mother (JoBeth Williams), who appears to him and tells him he has a question to ask her, but Charlie doesn't know what it is. Cases probed include: a toxic gas scare in downtown L.A.; a black-market organ-harvesting scheme; the murder of an Iraqi woman who was to appear in a documentary about women's rights in Muslim countries; and the apparent suicide of an FBI agent with romantic ties to Don.