Castle and Beckett investigate the mysterious death of an Arctic explorer during a polar expedition; Castle soon grows frustrated when realizing that the elusive killer might just be fooling them all.
Susan receives some surprising news while she's away on a romantic weekend with Ian, Lynette continues to try and support the family while Tom chases his dreams, and Bree finds her family is anything but perfect.
The BAU is called to Dallas to investigate when a serial killer lures and kills high-powered executives by posing as a high-class call girl.
Major Owen Hunt returns to be the head of ER trauma; Meredith finds an old doll her mother gave her when she was 5.
Jane and the CBI team narrowly escape a fiery end when a building explodes while they're investigating a death threat. Meanwhile, sparks fly between Lisbon and billionaire Walter Mashburn (guest star Currie Graham) when they meet again on the case.
