Chicago Fire

How To Watch the One Chicago Shows in Order (Including Every Crossover)

Posted on by Kenlio

If you’ve ever tried to dive into NBC’s One Chicago universe, you know it’s no small task. Spanning four main shows — Chicago Fire, Chicago P.D., Chicago Med, and the short-lived Chicago Justice — plus a handful of Law & Order: SVU tie-ins, the franchise is massive. Watching it all in proper order ensures you don’t miss any key crossovers or emotional connections between characters.

Here’s your complete guide to watching all the One Chicago series in chronological order, including every crossover event.How To Watch The One Chicago Shows In Order (Including The Crossovers)

1. Start with Chicago Fire (Season 1)

The One Chicago universe began with Chicago Fire in 2012. You can safely watch Season 1 straight through — it sets up the world of Firehouse 51 and introduces fan favourites like Casey, Severide, Dawson, and Chief Boden.

Important Episode:

  • Chicago Fire Season 1, Episode 23 – “Let Her Go”

    • This acts as the backdoor pilot for Chicago P.D.

2. Alternate Between Chicago Fire Season 2 and Chicago P.D. Season 1

When Chicago P.D. launched, it became tightly intertwined with Fire. Many early cases overlap.

Major Crossover:

  • Chicago Fire Season 2, Episode 20 – “A Dark Day”

  • Chicago P.D. Season 1, Episode 12 – “8:30 P.M.”

This two-parter marks the first major crossover and sets the tone for the shared universe.

3. The First SVU Crossovers and the Shay Storyline

By Season 3, Fire and P.D. begin crossing over more often.

Key Crossovers:

  • Fire Season 3, Episode 7 – “Nobody Touches Anything” (introduces P.D. characters)

  • Fire Season 3, Episode 13 – “Three Bells”

  • P.D. Season 2, Episode 13 – “A Little Devil Complex”

    • These connect through the emotional fallout from Leslie Shay’s death.

Then came the first three-way crossover with Law & Order: SVU:

  • P.D. Season 2, Episode 20 – “The Number of Rats”

  • Fire Season 3, Episode 21 – “We Called Her Jellybean”

  • SVU Season 16, Episode 20 – “Daydream Believer”

4. Enter Chicago Med

Chicago Med launched alongside Fire Season 4 and P.D. Season 3, expanding the universe into healthcare.

Backdoor Pilot: