Due South regular Daniel Kash exits the series in spectacular fashion when his character, Chicago detective Louis Gardino, is killed by a bomb intended for Ray (David Marciano). His grief exacerbated by a thirst for vengeance, Ray goes after the man whom he thinks is responsible for Gardino's death: Mafia boss Frank Zuko (Jim Bracchita), who grew up in Ray's neighborhood. Complicating matters is the growing romantic relationship between Ray and Zuko's sister Irene (Carrie-Ann Moss)--a relationship that leads inexorably to another tragedy. First broadcast on Canadian television, this episode made its US debut on February 2, 1996. ~ Hal Erickson, Rovi