“Chicago P.D.” will be back with new episodes next week after a short break. Last time the NBC series aired an episode, Kim Burgess’ (Marina Squerciati) sister Nicole (Jules Willcox) was brutally attacked. Fortunately, Hank Voight (Jason Beghe) and his team were able to successfully deliver justice.

Unfortunately, it meant that Burgess had to take a leave of absence in order to take care of her sister and her niece. This was the last episode in which Squerciati played the cop in Season 4. The actress will reprise her role in Season 5.

What will happen next week in “Chicago P.D.”?

READ: What is Burgess and Ruzek’s future?

The focus on the police procedural shifts from Burgess to Voight. The tough-as-nails detective investigates the murder of a teenage boy in Season 4, episode 20, according to the synopsis. However, the case becomes complicated when he finds a connection with the murder weapon used to kill the boy to an old case he worked on 17 years ago. Did Voight put the wrong man in jail?

Voight works hard to ensure that he put the right man in jail for a case he worked on more than a decade ago. Unfortunately, it is easier said than done because his old boss Lieutenant Denny Woods (Mykelti Williamson) is back. The promo shows Woods smearing Voight’s character in front of a committee of prestigious officers. Is Hank on trial?

While the Intelligence Unit’s boss faces increasing amount of pressure to solve his old case, the clock is ticking on his present case. The murdered teenage boy’s father (Philip Casnoff) is a prominent defense attorney and wants his son’s case to be handled by Area Central Homicide. Uh oh.

Furthermore, a new face will soon be seen in “Chicago PD” Season 4. Tracy Spiridakos makes her debut as a robbery detective named Hailey Upton in the May 3 episode. She replaces Squerciati for the time being. Upton butts heads with Voight on a case. She wants to take over the crime scene following a bank robbery. Interestingly, her past is linked to Platt (Amy Morton).

“Chicago P.D.” Season 4 airs Wednesdays at 10 p.m. EDT on NBC.

Chicago PD Hank Voight's (Jason Beghe, pictured here) old boss resurfaces in “Chicago PD” Season 4, episode 20. Photo: Matt Dinerstein/NBC