Alcatraz (2012)

S1E7 Johnny McKee

Madsen and Hauser are on the trail of Johnny McKee, a dangerous ex-Alcatraz prisoner with a chemistry background and a reputation for violence. They must act quickly to prevent him from inflicting further poison on unsuspecting victims. At the same time, new revelations come to light regarding Madsen's grandfather, adding another layer of intrigue to their investigation.