By Natalie Abrams
Updated May 24, 2016 at 09:10 PM EDT
Credit: Matt Dinerstein/NBC

Formerly crooked cop Voight (Jason Beghe) will be faced with possibly turning back to the dark side during the Chicago P.D. finale after his son gets shot.

With the squad concerned over “helping him, but also not wanting to go down the drain with him,” according to executive producer Matt Olmstead, Lindsay (Sophia Bush) must step up to make sure he doesn’t cross the line, which could cost him command of Intelligence. Below, Olmstead drops some teasers about the finale, which is ominously titled “Start Digging.”

ENTERTAINMENT WEEKLY: What can you tease of Voight’s conflict in the season finale?

MATT OLMSTEAD: Voight’s son has always been a bit of a screw-up. When we last saw Justin (Josh Segarra), he had a wife, a kid, and looks like he’s on the right path. We’ve teased that Justin has come back to Chicago and Voight finds out without Justin having let Voight know. In the finale, Justin gets shot and is clinging by a thread through the episode.

What it does is activate Voight into an old Voight, and then some, that we haven’t seen for a long time, hellbent on finding out who shot his son. Voight is completely off the leash looking for who did it. The reverberations through the squad in terms of the rest of the people he works with who answer to him, in terms of being sympathetic to what he’s going through, but also being a little wary because is he going to go too far? What does that mean for them? What does that mean for Voight? Voight could care less about what the ramifications are going to be.

Who will step up to stop Voight then?

It lands primarily on Lindsay, because she’s close to Voight. She is close to Justin. She had moved in when she was 14 years old. She knows Justin very well, he’s like a brother. She’s at once completely devastated by what happened, but then aware more than anyone that there may not be any coming back from this if Voight indeed does what it looks like he wants to do. That plays out certainly next season, not without her giving her best shot in this finale of trying to stop him from going too far.

Could Voight lose Intelligence over this?

He could, depending on if the fallout is such that he gets caught. What’s interesting is that the Commander goes for the most, in their estimation, level head and it’s Antonio (Jon Seda). We play this scene where Antonio’s been here before. Early on when Internal Affairs was going after Voight, they came to Antonio to try to peel him off from everyone else. Antonio definitely is the angel on Voight’s shoulder, so to speak. But he’s been the beneficiary of Voight’s policing style. When we had Antonio’s son kidnapped, Voight did what Voight does and got the kid back. To avoid being a massive hypocrite, he’s not in a big hurry to either throw Voight under the bus or step over his body to assume the command of the unit, but not without some tempting offers.

The finale will end on a cliffhanger. What can you tease in that regard?

The cliffhanger really goes down between Voight, Lindsay and the gentleman responsible for shooting Voight’s son. Each participant in that little triangle has a lot to lose. Some pay more dearly than others. It’s a struggle for Voight’s soul. He lost his wife, he has his son and he has Lindsay, that’s about it. When you start to snip these threads that keep people, in particular Voight, tied to normalcy and decency, he’s got less and less connection to that. It is primarily Lindsay’s concern that if he does something that he can’t come back from, or he loses his job from, or he goes to jail for, he could be lost forever. She’s trying to prevent him from going too far. That’s not high on Voight’s priority list.

The Chicago P.D. finale airs Wednesday at 10 p.m. ET on NBC. Get more scoop on the finale here.

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