On tonight: Watch the Chicago Fire Season 7 finale live

CHICAGO FIRE -- "I'm Not Leaving You" Episode 722 -- Pictured: (l-r) Taylor Kinney as Lt. Kelly Severide, Jesse Spencer as Matthew Casey -- (Photo by: Adrian Burrows/NBC)
CHICAGO FIRE -- "I'm Not Leaving You" Episode 722 -- Pictured: (l-r) Taylor Kinney as Lt. Kelly Severide, Jesse Spencer as Matthew Casey -- (Photo by: Adrian Burrows/NBC) /
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All hell is about to break loose. It must be the Chicago Fire Season 7 finale. Here’s how to watch it live on NBC.

Chicago Fire Season 7 airs its finale tonight, so of course, all hell is about to break loose. Here’s everything you need to know about the episode, including how to watch it live online.

The arson investigation continues during “I’m Not Leaving You.” It’s not that surprising considering everything that happened in the previous episode. This is a chance for Severide to close one of Benny’s longest cases and he’s not going to give up on this.

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Kidd is joining him on the case. The two always make a good team, but this is clearly setting up for something else. For the back third of the season, we’ve had the will-they-won’t-they storyline that has been delivered now and again. Will we find out that they will by the end of the season?

Meanwhile, Brett gets some unexpected news and has to make a big decision. I could hazard a guess at what this big news will be but I’m not sure I want to state the obvious. All I know is it’s going to put a spanner in the works for any plans with Casey — and I’m still not sure I’m on board with that ship.

Of course, there are going to be the usual call-outs for the night. I’m sure this is where we’ll get some of the comedic relief that we’ll likely need throughout this hell-breaking finale. At least we know it’s just a season finale and not a series finale.

Check out the Chicago Fire Season 7 finale promo and synopsis below.

"Severide and Kidd continue to investigate Benny’s old arson case; unexpected news leads Brett to ponder a big decision; all hell breaks loose."

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Make sure you don’t miss tonight’s episode live. If you do happen to miss it, you can catch up via NBC.com or Hulu but for now, here are all the live streaming details you’re going to need.

Date: Wednesday, May 22
Start Time: 9/8c
Episode: Season 7, Episode 22, “I’m Not Leaving You”
TV Channel: NBC
Live Stream: Stream 1 | Stream 2