When Platt goes to her father Robert's house for dinner, she warns him to be careful with his new girlfriend Natalie. Following dinner, Platt is physically assaulted as she's getting into her car and is rushed to Chicago Med. Voight, Lindsay and Halstead arrive at the hospital to investigate, and a concerned Mouch finds himself being questioned. Meanwhile, Antonio leads the rest of Intelligence at the scene as they look into previous threats against Platt, but his attention shifts when he is called into Robert's townhouse and finds signs of an even more gruesome attack on Platt's father.
Season 4 Episode 3 of Chicago PD was watched by 6,220,000 viewers, resulting in a 1.40 rating in the 18-49 demographic.
District 21 of the Chicago Police Department is made up of two distinctly different groups: The uniformed cops who patrol the beat and deal with street crimes, and the intelligence unit, the team that combats the city's major offenses, such as organized crime, drug trafficking and high-profile murders. Leading the intelligence team is Sgt. Hank Voight, a man not against skirting the law in the pursuit of justice.
Demanding and tough, only those who can take the heat survive under Voight's command. Take Det. Antonio Dawson, for example. Despite a troubled history with his boss, Dawson has ambitions of running the unit. If that means facing off against Voight every day, he'll persevere. From the street cops with dreams of moving up to the elite crew who are already in, life on the job is a daily challenge.