NBC released a new promo video for the upcoming premiere of “Chicago P.D.” Season 4 where Erin Lindsay (Sophia Bush) may have to decide between her relationship with Hank Voight (Jason Beghe) and her career as a police officer.

Chicago PD Season 4 Promo

“This intelligence unit serves the city without recognition for its bravery,” the head of police says in a press conference at the start of the promo for “Chicago P.D.” Season 4.