<Li> Alma Sisneros as Nurse Jocelyn Diaz (seasons 1--4). </Li> <Li> Catharine Pilafas as Nurse Bardocz (seasons 1--3). </Li> <Li> Luke Macfarlane as Rick Lincoln . Drew's army captain boyfriend . While coming home from deployment in Afghanistan, his bus had an accident and Scott was forced to amputate his right leg under the knee . He later becomes a combat trainer . After a fight and temporary breakup, he becomes Drew's husband in the season 2 finale and they adopt an orphaned girl, Brianna, in season 3 . </Li> <Li> Merle Dandridge as EMT Gwen Gaskin (seasons 2--3). Jordan's friend who dates Kenny until early in season 3, when she leaves to study law at Georgetown . </Li>

Who plays drew's husband on the night shift