NBC drama 'Chicago P.D.' is back on the air with Season 2 Episode 4 entitled "Chicken, Dynamite, Chainsaw."

Last week's episode, "Weigh Station," left viewers with a shocking cliff hanger after an unidentified person walked in at the bar where Jay Halstead (Jesse Lee Soffer) and Erin Lindsay (Sophia Bush) were hanging out and suddenly went on a "shooting spree," where an innocent bartender was shot.

The mysterious shooter initially targeted Halstead who had a bounty on his head, but instead hit the bartender who happened to be Halstead's close friend.

Prior to the shooting, Halstead asked Lindsay if he could stay in her house for a few days which will reportedly affect her relationship with Voight.

In the next episode, "Chicken, Dynamite, Chainsaw," two girls teenage girls, including a politician's daughter mysteriously go missing and the team will be racing against the clock to find them in a case "that will keep you guessing until the very end."

Halstead, Antonio (Jon Seda), and Lindsay will probe a tenement which will reveal important clues and help them move forward with the case.

Voight (Jason Beghe) confronts the father of the girls in the District 21 headquarters to probes him to reveal the truth about the disappearances. Meanwhile, Platt (Amy Morton) directs Roman (Brian Geragthy) and Burgess (Marina Squerciati) about a buy-back operation where they inquire on things they are not supposed to know.

"Chicken, Dynamite and Chainsaw" will see Elias Koteas, Patrick Flueger, LaRoyve Hawkins, Stella Maeve, Charlie Barnett, and Michael James Reed as guest stars.

'Chicago P.D.' is a drama spin-off of 'Chicago Fire', which revolves around uniformed police patrol and the Intelligence Division that looks for and tries to catch perpetrators and street offenders in the city of Chicago.

Season 2 Episode 4 "Chicken, Dynamite, Chainsaw" airs tonight at 10:00 pm on NBC.