When a modern-day prospector is found dead near a mining site and Lisbon is injured during the initial stages of the investigation, Agent Hightower joins Patrick Jane in the field for the first time.
All reassess their personal lives after witnessing a chance reunion between two long-lost lovers in the emergency room; Karev treats a troubled teen; Meredith shares her suspicions with Cristina.
Dr Sturgis recommends Missy and Sheldon for a study on twins, but Mary isn't pleased when the results go to Sheldon's head.
When Jake imitates one of Charlie's sexist remarks in front of Judith's support group, the women decide that Charlie's home is an unfit environment for the child. Charlie must cajole the support group in order to win his nephew back.
Malcolm reveals Cynthia's big secret to Reese, Dewey helps Hal overcome his fear of kites, and a neighbour makes amends to Lois and Francis becomes enchanted with a totem pole.