Title: Benjamin Stone (Law &amp; Order)
Content:  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.
Title: Stone (surname)
Content: Benjamin Stone in the TV series Law & Order ; Charlie Stone, a character in the TV series Veronica Mars ; Judge Harold T. Stone in the TV series Night Court ; Henry Stone, fictional character in The Fugitive ; Dr. Jeremy Stone, character in the film The Andromeda Strain ; Jesse Stone, policeman in Jesse Stone novels by Robert B. Parker, also a film series featuring Tom Selleck in the title role ; Michael Stone (Hustle) played by Adrian Lester on the BBC drama series Hustle ; Lt. Mike Stone played by Karl Malden in The Streets of San Francisco ; Nick Stone, fictional hero of several books by 
Title: Peter Stone (Chicago Justice and Law &amp; Order: Special Victims Unit)
Content:  Stone is the son and second child of former Law & Order character, Benjamin Stone, and the younger brother of Pamela Stone. He has an aunt Carol who raised him for most of his life. He was born circa 1981. Before becoming a lawyer, Stone was a pitcher for the Chicago Cubs. He was forced to retire from baseball after tearing his UCL, and decided to follow in his father’s footsteps by going to law school and becoming an assistant district attorney. Nevertheless, he has described having a difficult relationship with his workaholic father, who he felt cared more about prosecuting criminals than about his own family.
Title: Benjamin Stone (Law &amp; Order)
Content:  Stone's son is Peter Stone (Philip Winchester), formerly a Cook County Assistant State's Attorney and lead character on Chicago Justice. Peter first appears on the Chicago P.D. episode "Justice", which is the backdoor pilot for Chicago Justice. Peter also appears in season 19 of Law & Order: Special Victims Unit, and eventually becomes the titular sex crimes bureau's ADA. In several episodes, Peter describes Ben as a distant father who neglected his family in favor of work. Stone also had a daughter, Pamela (Amy Korb), who is introduced in the SVU episode "Send in the Clowns". Pamela has paranoid schizophrenia, and has been hospitalized for most of her life. According to Peter, their father would visit Pamela once a week, and Peter has continued the visits since their father's death. She is murdered by sex traffickers in the SVU episode "Remember Me Too".
Title: Benjamin Stone (Law &amp; Order)
Content:  Stone works in the Manhattan District Attorney's office under Alfred Wentworth (Roy Thinnes, in the pilot episode "Everybody's Favorite Bagman") and Adam Schiff (Steven Hill). 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 (Philip Winchester), who was the Deputy Chief of the Special Prosecutions Bureau in Chicago and was the Chief ADA of the Sex Crimes Bureau in New York, and a daughter, Pamela (Amy Korb). Stone's prosecutorial methods are portrayed as being grounded in moral principles stemming from his Catholic faith. He is shown to be anti-abortion and opposed to the death penalty. He also is a strong advocate of social justice, having marched in the civil rights movement. It is implied that Stone, like actor Moriarty, is a Dartmouth College alumnus, with references to "fraternity row" and New Hampshire.
Title: Benjamin Stone (Law &amp; Order)
Content:  Stone became Executive Assistant DA in 1985 after convicting con artist and murderer Philip Swann (Željko Ivanek), who years later enters a civil suit against Stone when the validity of the conviction is called into question. Swann is ultimately found guilty, however, and sent back to prison. Stone's assistants have been Paul Robinette (Richard Brooks) and Claire Kincaid (Jill Hennessy). A strict, unyielding boss, Stone can be very difficult to work with; in the pilot episode, Sergeant Max Greevey (George Dzundza) and Detective Mike Logan (Chris Noth) intimate that Stone "eats ADAs for lunch." Nevertheless, Stone is usually rather soft-spoken, and is fond of using harmless words like "sir" to convey his contempt for the people he prosecutes. Stone makes his last appearance in the show in the episode "Old Friends," the final episode of season four. The episode portrays a racketeering case in which the main witness Ann Madsen (Allison Janney), whose testimony Stone had secured by threatening to send her to prison, is murdered by the Russian Mafia. He feels responsible for her death and resigns from the DA's office. He is succeeded by Jack McCoy (Sam Waterston) as Executive ADA.
Title: Benjamin Stone (Law &amp; Order)
Content:  "Uncertainty Principle", Stone receives a call from his son, Peter, who had just faced off against his former colleague Paul Robinette. The opening scene of the Law & Order: Special Victims Unit episode "The Undiscovered Country" (aired in 2018) reveals that Stone has died. His successor, Jack McCoy, gives the eulogy at the funeral. The Special Victims Unit episode "Dear Ben" mentions Stone several times. The plot of the episode revolves around the cold case of a serial rapist whom Stone repeatedly attempted to track down and prosecute, to no avail. The Special Victims Unit detectives eventually bring the rapist to justice.
Title: Benjamin Stone (Law &amp; Order)
Content:  Stone's departure from Law & Order stemmed from actor Michael Moriarty's dispute with the network and U.S. Attorney General Janet Reno, who in 1993 began promoting legislation to limit portrayals of violence on television. Moriarty, who was outspoken against Reno and what he felt was government censorship, was scheduled to appear on NBC shows Today and Now with Tom Brokaw and Katie Couric, but both ended up canceled. Moriarty had already taped his segment for Now; for his Today show appearance, during which he was scheduled to debate Senator Kent Conrad, he was replaced by FCC chairman Reed Hundt. Both appearances were scheduled to air on January 26, 1994. Moriarty submitted his resignation to producer series creator Dick Wolf on January 25, 1994, and his departure was written into the series.
Title: Rob Stone (actor)
Content:  Stone is a native of Dallas and is the son of Dr. Marvin and Jill Stone. His father was chief of oncology at the Sammons Cancer Center at Baylor University Medical Center. Stone began acting at the age of 13, first appearing onstage in a production of "Santa Fe Sunshine" at the Dallas Theater Center. In 1982, he moved to Los Angeles to pursue an acting degree at the University of Southern California's drama school. In addition to his role on Mr. Belvedere, Stone also appeared on episodes of the American television series The Facts of Life, Silver Spoons, 21 Jump Street and Matlock. Andrew Greeley, writing in The New York Times, called Stone's acting in one episode of Mr. Belvedere "very sensitive". Discussing that 
Title: Law &amp; Order (season 4)
Content:  The fourth season of Law & Order aired on NBC between September 15, 1993, and May 25, 1994. This is the final season to feature Michael Moriarty as Ben Stone. It is also the first season to include a shorter opening sequence and theme (at 46 seconds), which would be used for the remainder of the series' run. Season four was released on DVD December 6, 2005.

Question: who played ben stone son on law and order?
Answer: Michael Moriarty.