法律与秩序
演員與角色 > 第四到七季

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By the end of season 3, NBC executives still felt the show did not have enough female characters. On the orders of then-network president Warren Littlefield, new female characters had to be added to the cast or the show would face possible cancellation on its relegated Friday night time slot. Wolf realized that, since there were only six characters on the show, someone had to be dismissed. He chose to dismiss Florek and Brooks from the regular roster, and later said it was the hardest two phone calls he had ever made. Though producers initially claimed the firings, especially that of Brooks, who was said not to get along with Moriarty, were for other reasons, Wolf confirmed that the firings were on the orders of Littlefield.
To replace Florek, S. Epatha Merkerson was cast as new squad leader Lieutenant Anita Van Buren. (Merkerson had previously guest starred as a mother of a gunshot victim in the season 1 episode "Mushrooms".) To replace Brooks, Jill Hennessy was cast as Assistant District Attorney Claire Kincaid. Though no initial explanation was given on the show for the departures of Florek's or Brooks's characters, they would both later return in guest appearances, with Captain Cragen having been reassigned to the Internal Affairs Bureau and A.D.A. Robinette having become a defense attorney. Florek also returned to direct a few episodes, and his character was eventually added to the cast of Law & Order: Special Victims Unit.
Meanwhile, Moriarty's behavior both on and off the set became problematic for Wolf. After a public statement in which Moriarty called Attorney General Janet Reno a "psychopathic Nazi" for her efforts to censor television violence, Moriarty engaged in a verbal confrontation with Reno at a dinner in Washington, D.C. Wolf asked Moriarty to tone down his comments, and Moriarty responded by quitting the show the next week. This could have been caused by his drinking, as he admits to being "a very bad drunk" before going on the wagon in February 2004. The final storyline for Ben Stone involves his resignation over guilt after a woman he compelled to testify against a Russian mobster was murdered by his cohorts. To replace Moriarty, Sam Waterston was Wolf's first choice for the role of Executive Assistant District Attorney John J. "Jack" McCoy Jr.; Waterston's character was markedly different from Moriarty's in that Jack McCoy was conceived as more emotionally stable and having more sex appeal.
Wolf dismissed Noth when his contract expired at the end of season 5, because he felt that Lennie Briscoe and Mike Logan had become too similar to each other and the writers were having difficulty in writing their dialogue together. Furthermore, Noth had been disgruntled with the show since the dismissals of Florek and Brooks, and remained embittered against Wolf, who he felt was not a friend to his actors. The final storyline for Detective Logan involved his banishment to work on Staten Island in a domestic violence crimes unit as punishment for punching a city council member who had orchestrated the murder of a gay colleague and had managed to get acquitted of the charges. (The made-for-television film Exiled: A Law & Order Movie, in which Noth starred, centers on Logan's attempt to get back into the department's good graces.) Noth was replaced by Benjamin Bratt as Detective Reynaldo "Rey" Curtis, who was hired in an attempt to find an actor even sexier than Noth to join the cast.
Hennessy chose not to renew her three-year contract at the end of season 6 to pursue other projects, and Claire Kincaid was written off as being killed in a drunk driving accident. She was replaced by Carey Lowell as Assistant District Attorney Jamie Ross. Lowell remained with the show until the end of season 8, when she left to spend more time with her daughter. (Jamie Ross was written off as leaving the D.A.'s office for similar reasons.) Lowell (who later returned for a couple guest appearances) was replaced by Angie Harmon as Assistant District Attorney Abigail "Abbie" Carmichael, who was conceived as being much louder and outspoken than any of her predecessors. Harmon auditioned with 85 other women, including Vanessa Williams, for the role, and was picked after Wolf heard her Texas accent.