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