When Lindsay is tipped off about a grieving father looking to avenge his daughter's death, Olinsky goes undercover as a hitman-for-hire. With Gang Intelligence lacking enough evidence to arrest the original gang-banger in question, the team works to reinvestigate the case. Ruzek comes back after finishing his undercover assignment only to have Voight knock him down to patrol duty.
Elenco:
Jason Beghe
,
Jesse Lee Soffer
,
Marina Squerciati
,
Patrick John Flueger
,
Laroyce Hawkins
,
Amy Morton
,
Elias Koteas
,
Jon Seda
,
Sophia Bush
,
Tracy Spiridakos
,
Brian Geraghty
,
Lisseth Chavez
,
Archie Kao
.