Russell and Sorenson try to close a stabbing case so that Kirkendall's son, a witness to the crime, doesn't have to testify.
Russell and Kirkendall's relationship is strained when they try to solve the murder of a prostitute's baby; Sipowicz and Sorenson try to help a parolee.
The subject of Kirkendall's former husband strains Jill and Diane's partnership; an interdepartmental shake-up leads to permanent change.