couples:
tim and lucy; they have been married for almost a year. lucy is a detective and tim is a metro sergeant.
jay and erin; about to get married. both detectives in intelligence unit
gabby and matt; been married a couple years. matt is captain of truck 81 and gabby is a paramedic both work at firehouse 51
buck and eddie; haven't been together too long about 4 months. both firefighters at the 118
chris and street; been together just over a year. both swat officers (chris never left)
additional characters:
the rookie; angela nyla
swat; deacon luca tan hondo
911; hen chimney bobby maddie
chicago pd; voight ruzek antonio al kevin kim trudy mouse
chicago med; will natalie ethan april
chicago fire; hermann mouch severide shay otis cruz stella boden
how they know each other;
jay tim eddie and street were in the military together
erin lucy buck matt and street have known each other since they were 5 (all 5 of them grew up in la and had normal childhoods)
chris and gabby are cousins
jay lucy and will are siblings their dad moved jay and will to chicago when their parents got a divorce lucy was 5 so she remembers jay was 3 and will was 1.