Peyton Driscoll

Dr. Peyton Driscoll (Claire Forlani) (Seasons 3–4, 6) joins the team at the beginning of the third season as a Medical Examiner originally from London and love interest for Mac. Peyton was previously acquainted with Sheldon Hawkes when he was still in the ME's Office. She feels guilty in episode 307 "Murder Sings the Blues" when she accidentally lets it slip to Mac that Hawkes knew a murder victim, which results in Hawkes being reprimanded and kicked off the case. In episode 320 "What Schemes May Come," Peyton is assaulted at the morgue by two people who steal one of the bodies she is helping to transport. At the end of episode 324 "Snow Day" Peyton and Mac fly to London together to meet her family. She does not return and in Season 4 sends Mac a "Dear John" letter. However, Peyton returns for a visit in episode 622 "Point of View". Forlani was expected to return during Season 7, however the departure of Melina Kanakaredes and the subsequent casting of Sela Ward changed the producers' intentions.