<Ul> <Li> Noah Sexton (Roland Buck III) is an emergency medicine resident and younger brother of April . It is implied in a conversation Severide had with April that Noah is the "golden boy" of the family who got to go to medical school with his sister's financial assistance despite April being the more academically inclined of the siblings . He has a torrid start to his rotation at Chicago Med and is quickly intimidated after following the residents on shift at the Emergency Department . He resorts to using Reese's ideas to earn Dr. Choi's favor but she finds out about it and gives him a cold shoulder . </Li> <Li> Cornelius Rhodes (D.W. Moffett) is the father of Dr. Connor Rhodes . He runs the family business Dolen Rhodes, a high - end department store started by his father . His wife Elizabeth died at some point before the pilot . As the only son and heir to the family fortune, Connor was expected to follow his father into the family business but eschews it for medicine . Elizabeth's death and Connor's choice to go into medicine lead to a bitter estrangement between father and son . </Li> <Li> Claire Rhodes (Christina Brucato) is the sister of Connor . </Li> <Li> Helen Manning (Annie Potts) is the mother - in - law of Dr. Natalie Manning . </Li> <Li> Emily Choi (Arden Cho) is the sister of Dr. Ethan Choi . Unlike her brother, Emily is much more free - spirited but her reckless behavior has landed her into trouble with alcohol and drugs . Dr. Choi clashes with his girlfriend April over how to deal with Emily . In season 4 she starts dating Bernard Kim (C.S. Lee), a much older man whom she had met at her AA meeting . </Li> <Li> Robert Haywood (Michael Gill) is a professor and the father of Dr. Sarah Reese . </Li> <Li> Patrick "Pat" Halstead (Louis Herthum) is the late father of Dr. Will Halstead and Detective Jay Halstead . He first appeared in the Season 2 episode "Generation Gap" when Jay calls Will from their childhood house about Pat's heart condition . Pat was later sent for open heart surgery at the end of the episode . According to the brothers, Pat disapproved of their career choices, leading to their estrangement for many years . Will finally reconciled with him at the end of "Generation Gap". Pat died in the crossover episode "When to Let Go" of complications caused by smoke inhalation from the fire . </Li> </Ul> <Li> Noah Sexton (Roland Buck III) is an emergency medicine resident and younger brother of April . It is implied in a conversation Severide had with April that Noah is the "golden boy" of the family who got to go to medical school with his sister's financial assistance despite April being the more academically inclined of the siblings . He has a torrid start to his rotation at Chicago Med and is quickly intimidated after following the residents on shift at the Emergency Department . He resorts to using Reese's ideas to earn Dr. Choi's favor but she finds out about it and gives him a cold shoulder . </Li> <Li> Cornelius Rhodes (D.W. Moffett) is the father of Dr. Connor Rhodes . He runs the family business Dolen Rhodes, a high - end department store started by his father . His wife Elizabeth died at some point before the pilot . As the only son and heir to the family fortune, Connor was expected to follow his father into the family business but eschews it for medicine . Elizabeth's death and Connor's choice to go into medicine lead to a bitter estrangement between father and son . </Li> <Li> Claire Rhodes (Christina Brucato) is the sister of Connor . </Li>

Who plays dr rhodes father on chicago med