7. Season 6
Not a bad season, per say. Season 6 toned down the action of the season prior in favor of personal dynamics, and while that’s not inherently a bad thing, it does make things slower on rewatch.
It feels like the show really takes its time to get Severide and Kidd together, and the storylines between Casey and Dawson (Monica Raymund) take on a similarly ponderous speed. There’s not much about season 6 that’s in a hurry, and the best Fire seasons are the ones that balance the personal drama with the death-defying rescues. Hence the placement here.