- as Lieutenant Matthew „Matt“ Casey
- as Otis
- as Lieutenant Kelly Severide
- as Joe Cruz
- as Peter Mills
- as Mouch
- as Erin Lindsay
- as Gabriela „Gabby“ Dawson
- as Leslie Elizabeth Shay
- as Jeff Clarke
- as Chief Wallace Boden
- as Allison Rafferty
- as Lieutenant Christopher Herrmann
- as Katie Nolan
- as Officer Kim Burgess
- as Donna Robbins
- as Sam Danvers
- as Capp
- as Vince Keeler
- as Maggie Danvers
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