Regan Rohde

When legal issues complicate matters that stall a life-saving bone marrow transplant, Sharon Goodwin (S. Epatha Merkerson) must decide whether to disobey direct orders or stand by and put a patient's life in jeopardy. April (Yaya DaCosta) tends to a caring, homeless man who Dr. Charles (Oliver Platt) evaluates, only to come to an unusual diagnosis that explains his recent behavior. Dr. Natalie Manning's (Torrey DeVitto) parents (guest stars Michael Hendricks and Regan Rohde) come to town to see their new grandchild, much to the dismay of her mother-in-law, Helen (guest star Annie Potts). Dr. Connor Rhodes (Colin Donnell) treats a couple who are injured on their first date by a hit-and-run driver, who Dr. Halstead (Nick Gehlfuss) discovers has his own reasons for causing the accident.

Ethan hires an old Navy colleague to join him in the ED. A final custody hearing threatens to separate Charles and his daughter. Maggie must make a choice that will change Auggie's life.

Carol receives a second chance at life when a new heart becomes available. Ethan and Dean find themselves in hot water with an old patience. Will faces the consequences of the stolen trial medication.

Ethan teams up with an unexpected person to treat a famous tennis player who is afraid his career might be over. Goodwin's new protocols cause a stir.

Dean and Ethan respond to a scene that brings back some bad memories. When Carol's condition worsens, Natalie is willing to do whatever it takes to get her mom feeling better.