George Newbern, who plays Mitchell Sheridan in this episode, co starred with Melina Kanakaredes in the show Providence and they got married in the last episode. They don't have interaction in this episode though.
He also appears in the CSI: Miami episode To Kill a Predator and in the C.S.I. one Bloodlines. It is interesting to notice that the CSI: Miami episode is also about a paedophile, and the CSI episode is about a rape.