It’s Christmas Eve in the ER, and Kovač arrives for his first day as Chief of Emergency Medicine wearing a Santa hat, with presents for everyone. Kerry, Pratt and Abby treat a girl who is the victim of a random bullet fired by gang members, leading to a vigil outside the ER and a "scared straight" lesson, administered by Pratt, in the consequences of gun violence. Clemente’s former flame arrives, and the fires re-ignite, despite his efforts to resist. When a testy Santa insults a group of blind children, Eve’s extreme response forces Luka to bring in the nursing supervisor, and Eve is fired. Haleh auditions singers for the Christmas party and finds a surprising partner in Morris. At the end of the day, the gang gathers for the annual Christmas party. Luka and Abby exchange gifts, and Abby tells Luka she's pregnant.
Callie Thorne, China Jesusita Shavers, David Weisenberg, Deezer D, Dominic Janes, Garret Dillahunt, Gary Kraus, Gus Hoffman, John Leguizamo, Kristen Johnston, Laura Ceron, Lynn A. Henderson, Troy Evans, Yvette Freeman