The Unusuals

Det. Casey Shraeger meets the other zany but secretive detectives which make up the homicide squad in which she was just transferred to. Her partner will be Det. Jason Welsh, who is already working on a case of who killed his former partner.

A family of criminals has the detectives running all over the city until Walsh and Shraeger discover their motives and negotiate a stop to all the crime. Brown has Shraeger investigate Walsh's past because her former partner turned out to be a dirty cop. Meanwhile, Cole's former partner in crime returns, making it even more difficult for Cole to continue to hide his criminal past.

Banks and Delahoy investigate a store selling murder weapons and instructions on how to get rid of the body. Nixon asks Casey to help get a client's son out of trouble on a bogus charge.