Frisco Blues

S4 E23: The SIU is disbanded by MCD: Nash and Joe are assigned to Park Detail, Harvey to Homicide, Evan to Traffic, and Caitlin to Vice. Still, Nash manages to solve a murder involving the Head of MCD's daughter and a drug dealer. Evan and Cassidy announce a wedding date; best man Harvey throws a bachelor party, but finds out the stripper is Anna. Nash tells Caitlin he loves her, but she accepts a job in Boston.