Simone and Sipowicz investigate the murder of two roommates. A guy that Medavoy knows comes in with story about a man wanting to hire a hit man. Medavoy wants to play the part of the hit man when they go to arrest him; since nobody thinks he looks the part, Martinez gets the role. Kirkendall and Russell investigate the claim of a wealthy woman that her maid did not accidentally donate the diamond necklace that the woman kept in a safe place disguised as a soup can. Diane reports to Bobby that she is 4 days late.