The son of a self-made millionaire vanishes on his way to school; a rebel investigator must retrieve the victim.
The Cain family receives a parcel that suggests more of the children might be in danger; Knapp goes to Brown University to look for Aubrey.
The Cain family host their annual charity ball to prevent the public from discovering that Leopold has been kidnapped; Conrad Cain confronts a former childhood friend who appears unannounced.
Special Agent King senses that something is wrong as Virgil is prepped for surgery; Knapp goes under cover to find the origin of the specialised bullet that struck Virgil.
Knapp and Special Agent King investigate the ruins of a fire-ravaged textiles building, where a room was carefully rigged to detonate on command.
Ellie Cain's father (Robert Foxworth) negotiates to get his grandson back; Knapp and King uncover information about the Cain family's past.
Amy Ryan
Maureen Campbell
Jeremy Sisto
Knapp
Delroy Lindo
Spec. Agent Latimer King
Dana Delany
Ellie Cain
Timothy Hutton
Conrad Cain