The Untouchables S04E04 - The Economist

With the price of illicit liquor bottoming out, Vincent Tunis suggests to his fellow syndicate members that they store their liquor rather than sell it, thereby creating an artificial shortage and pushing up the price. Eliot Ness and his men become aware of what's going on when the syndicate also starts to put small moonshiners out of business. When the only mobster who knows the location of the liquor is killed, Ness and his men try to find the only remaining truck driver from the job before the syndicate does.