Episode 4
S3, E4: Voight believes the man who tried to kill him is someone he and Olinsky once put away; Atwater unintentionally spills information about Ruzek's history that disturbs Burgess.

S3, E4: Voight believes the man who tried to kill him is someone he and Olinsky once put away; Atwater unintentionally spills information about Ruzek's history that disturbs Burgess.