Guest Stars Alisha Boe as Grace Clarke Marcus Giamatti as Artie Sneed Nancy De Mayo as FBI Agent Lauren Stamile as Dr. Colleen Marks Jessica Tuck as Dr. Giana Luca Colleen Foy as Paramedic Mark Atteberry as Male Doctor Shaan Sharma as Doctor # 2 Andrew Lukich as Mike Mullen Nathan Pelle as Thomas Knight Huntington Daly as Crash Team Nurse Craig Rhodes as Security Guard Katie Roberts as Nurse # 2 Natisha Anderson as Nurse # 1 Lucas Kwan Peterson as Young Male Nurse
