With Antonio's life in the balance, the team desperately search for Pulpo before it's too late.
Voight and the team race to solve a gang shooting witnessed by Olinsky's daughter, fearing she could now be a target.
The actions of a traumatised father push the team to go to extreme lengths in their search for his daughter.
A mass killing in Chinatown puts the Intelligence Unit on the trail of a notorious gangster who narrowly evaded Olinsky years earlier.
The Intelligent Unit hunt for an arsonist whose actions left dozens dead and Olinsky's daughter in a coma.