Guest Stars Susan Misner as Leah Mayne Christine Lakin as Rachel Wells Alex Hyde-White as Dr. Adam Tallridge Randy Vasquez as NCIS Agent Roger Voight Virginia Watson as Nurse Ruth Corruthers John Edward Lee as Former Marine Sergeant Matthew Gontz Sarah Lewis as I.C.U. Doctor Michael Edward Rose as Marine Major Gordon Holcomb Joe Guzaldo as Pete Iger Wolfgang Bodison as National Park Inspector Edward Killian Lauren Sánchez as NCIS Agent Sanchez Robert Maxhimer as National Park Officer Will Elliott Ryan McCann as Former 1st Lieutenant John Mayne
