Hack is an American crime drama television series created by David Koepp that aired on CBS in the United States from September 27, 2002 to March 13, 2004, having 40 episodes broadcast over two seasons. The series centers on former Philadelphia police officer Mike Olshansky (David Morse), who leaves the force after being accused of corruption and works as a taxi driver.

Mike Olshansky, a Philadelphia police officer, leaves the force after being accused of corruption. Although the charges were never clearly proven, Olshansky, riddled with guilt, considers it his duty to make up for his past wrongs by helping those the police will not help. While working as a taxi driver, Olshansky saves many lives and people by going above and beyond the call of duty, becoming a kind of heroic vigilante.

He receives "inside" help from within the police force from his ex-partner Marcellus Washington, who often comes close to risking his own career. Meanwhile, he tries to repair his relationships and rebuild his life after losing his marriage, his son's admiration, his professional identity and his reputation.