Guest Stars Melinda McGraw as Dr. Greta Pryor Barbara Eve Harris as Lydia Doyle Toby Hemingway as Gabe Josette Canilao as Naomi Steve Harris as Beaumont Shannon Chan-Kent as Claire Omid Abtahi as Jake Co Starring Andres Joseph as Dr. Fleisher Tracy Waterhouse as Nurse Lindsay Julien Hyacinthe as Security Guard Patricia Cullen as Lisa Jesse Reid as Tech Consultant Bill Marchant as Gerry Anthony Harrison as Senator Howe Andy Nez as Frank Nicole Anthony as Medical Officer Anthony Shudra as Young Marshall