The Untouchables S04 E30 A Taste for Pineapple

"The true story of FBI man Eliot Ness's savage war on the notorious mobsters Al Capone left behind!"

May 14, 1931. Eliot Ness and his men notice that the top bosses are leaving Chicago: Frank Nitti has gone to Atlantic City; Bugs Moran and Jack Diamond have left, too. As Ness puts it, ""The rats are leaving the ship."" Obviously, they want to be out of town when someone important is hit. What Eliot doesn't know is that he is the target.