The body of the key suspect in a corruption case is found by a woman following mysterious voices. Meanwhile, McGee and Delilah can't come to an agreement over finding out their unborn baby's sex.
Danny and Baez meet with resistance while investigating a bombing; Frank deals with political fallout after a man punches an aggressive officer.
Alicia and the children adjust to having Peter back home. At work, Alicia teams up with Diane to help a client testify against her wealthy husband in a murder case. Elsewhere, Peter sets to work on rebuilding his reputation.
After being reactivated to the NSA, Henry lies about it to Elizabeth; the office is impacted by Daisy and Matt's antagonism.
Booth and Aubrey find themselves in Canada, following a young woman's death. Elsewhere, Brennan tries to deal with her grief.