<Tr> <Th> Credited appearances </Th> <Td> 88 episodes (total) </Td> </Tr> <Tr> <Th> Succeeded by </Th> <Td> Jack McCoy </Td> </Tr> <P> Benjamin "Ben" Stone is a fictional character portrayed by Michael Moriarty in the TV drama Law & Order . He was the Executive Assistant District Attorney for New York County until his resignation at the end of season four . He appeared in 88 episodes . </P> <P> Stone works in the Manhattan District Attorney's office under Alfred Wentworth (in the pilot episode) and Adam Schiff . He was raised in an Irish Catholic family . He was raised mostly by his Irish grandmother, his father having been an alcoholic . Stone is divorced and has a son, Peter Stone, who was the Deputy Chief of the Special Prosecutions Bureau in Chicago and is now the Chief ADA of the Sex Crimes Bureau in New York, and a daughter, Pamela . </P>

Who played ada stone on law and order