Many a resident has departed the Windy City since the #OneChicago franchise launched in 2012.

Below, TVLine has compiled a comprehensive guide to all the characters who have bid adieu to Chicago Fire and its spinoffs Chicago P.D. and Chicago Med, ranked from least to most significant. Our list includes details on how and why each actor was written out, as well as their first and last episodes so you can revisit their arcs. You might even find a few people whom you forgot have come and gone through Chi-Town. (Note: We limited our ranking to series regulars — or those who would have been full-time cast members, in a couple special cases — and heavily recurring characters.)

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The departures run the gamut from shockingly tragic deaths (R.I.P., Otis, Shay, Olinsky and more) to hopeful new beginnings (hi, Peter Mills!). And of course, some goodbyes were harder than others to accept, while some exits left a more lasting impact on both viewers and the other characters. So which exit shocked the world of Chicago the most?

Review our rankings to see who topped our list, then hit the comments to tell us which goodbye hit you hardest and who you miss the most!

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