Castle and Beckett investigate the murder of a Wall Street trader, but the case takes a shocking turn when the they discover the victim was an undercover informant for the U.S. Attorney's office. To complicate matters further, the U.S. attorney involved is Elizabeth Weston, Captain Gates' estranged sister.
|Ramon Fernandez||Guest Star|
|Rosie Garcia||Guest Star|
|Juan Carlos Cantu||Guest Star|
|Salli Richardson-Whitfield||Guest Star|
|Kevin Kilner||Guest Star|
|Laurie Fortier||Guest Star|