S4·E4 The Iceman Taketh

As Brigatti carries out her plan to entice the thief with an expensive diamond pendant, her relationship with Gary grows more personal since they are forced to spend several days and nights together. When it appears that the case has been solved, Gary reads that the diamond will turn out to be a fake -- putting Brigatti's career in jeopardy. Armed with tomorrow's news, only Gary can save Brigatti's job by finding the true thief and returning the diamond to its owner.