Ryan O'Neal

Brennan's late work day has disastrous results when she is shot by someone at the lab and the team's investigation reveals the shooter has a connection to the Jeffersonian. Meanwhile, at the hospital, Brennan struggles to reconcile the illogical visions of her mother with her absolute belief in science and reasoning.

The body of a high school guidance counselor may be Brennan's ticket home, but first the team must determine if Christopher Pelant is still controlling events behind-the-scenes. Meanwhile, Brennan and her father manage to elude the feds, and the FBI puts the Jeffersonian under the microscope.

Christopher Pelant's appeal of his verdict goes to trial, and Booth and Brennan do everything they can to keep him behind bars. But a new murder with ties to Pelant that the team hopes will put him permanently in prison takes a nasty twist that puts Brennan's freedom in jeopardy.

Another body is discovered in the woods. This time the investigation reveals the victim was part of a Hatfield-McCoy-type battle between two families. At home, Brennan's reluctance to accept her father's babysitting services means she must delve into her own family history to understand her feelings.

In the fourth season finale, a murdered body is discovered at a popular nightclub called "The Lab." The Jeffersonian team takes on unusual roles, including the nightclub staff and law enforcement, in this dream-world episode.