• Air date: 25 Sep '09 23 episodes
      The 20th and final season of Law & Order premiered on NBC on September 25, 2009, for which it was moved from its previous time slot to air on Fridays at 8 p.m. ET for the NBC broadcast. L&O was moved to Monday nights on March 1, 2010 with a two-hour telecast at 9 p.m. ET, before settling into its new time slot at 10 p.m. the following week, March 8. During the season, The Jay Leno Show in primetime was cancelled and Leno returned to the 11:35 pm Tonight Show because of affiliate dissatisfaction. Three more episodes of Law & Order were ordered to fill the primetime gap, increasing the number of episodes for the season to 23. In early January 2010, NBC initially announced they were going to renew Law & Order a 21st season. NBC's President of Primetime Entertainment at the time, Angela Bromstad, said, "I’m a "Law & Order" junkie... I wouldn’t want to be responsible for not having "Law & Order" break the record." But on May 14, 2010, NBC abruptly cancelled Law & Order after 20 seasons on the air, tying it with Gunsmoke as American network television's longest-running, regularly scheduled primetime drama. The final episode aired on NBC May 24, 2010. The late announcement of the cancellation resulted in Law & Order not having a "series finale" episode. Had the series continued, it would have been the last to feature S. Epatha Merkerson, who prior to the cancellation announcement had herself announced that she would not return for the 21st season.
  • List of Episodes (23)
    • 1. Memo From The Dark Side

      25 Sep '09
      The body of a young war veteran is found in a parking garage and the murder is connected to a law professor who used to work for the Department of Justice.
    • 2. Just A Girl In The World

      02 Oct '09
      A crime scene investigator is murdered in her apartment. Her fiance is suspected, but then a journalist is attacked and DNA is found at the scene that links this crime to the murder.
    • 3. Great Satan

      09 Oct '09
      Detectives Lupo and Bernard investigate when an aspiring musician is found dead. A bag of cash leads them to multiple suspects.
    • 4. Reality Bites

      16 Oct '09
      A mother of ten adopted special needs children is murdered. The day after her murder, her husband appears on reality TV.
    • 5. Dignity

      23 Oct '09
      A doctor who performs late-term abortions is murdered in church. The case falls apart for Cutter when Rubirosa is touched by an abortion nurse's testimony.
    • 6. Human Flesh Search Engine

      30 Oct '09
      Bernard becomes the target of a dangerous website that is partly responsible for a homicide the detectives are investigating
    • 7. Boy Gone Astray

      06 Nov '09
      When a young woman is found dead in her apartment, a few tell-tale signs quickly lead Detectives Cyrus Lupo (Jeremy Sisto) and Kevin Bernard (Anthony Anderson) to believe that the killer was not after her wealth.
    • 8. Doped

      06 Nov '09
      A deadly drunk-driving car accident brings Detectives Cyrus Lupo and Kevin Bernard to the scene when a suspicious nasal spray is found. After the medical examiner realizes the nasal spray is a powerful anesthetic that could easily disorient its user, the detectives become suspicious of the victim's boss, Zach Marshall
    • 9. For The Defense

      13 Nov '09
      A case that begins as a search for a missing witness spirals into a murder conspiracy with ADA Connie Rubirosa caught in the middle.
    • 10. Shotgun

      20 Nov '09
      When an elderly man defends his shop from an armed robbery, Detectives Kevin Bernard and Cyrus Lupo suspect that this incident could have been an inside job. After further investigation, the detectives discover that the mugging might have been a scare tactic for a shakedown.
    • 11. Fed

      11 Dec '09
      "Fed" is the eleventh episode of the twentieth season of NBC's long-running legal drama Law & Order.
    • 12. Blackmail

      15 Jan '10
      Blackmail is the twelfth episode of the twentieth season of the television series Law & Order. It aired on NBC January 15, 2010.
    • 13. Steel-Eyed Death

      01 Mar '10
      "Steel-Eyed Death" is the thirteenth episode of the twentieth season of NBC's long-running legal drama Law & Order.
    • 14. Boy on Fire

      01 Mar '10
      "Boy on Fire" is the fourteenth episode of the twentieth season of NBC's long-running legal drama Law & Order.
    • 15. Brilliant Disguise

      08 Mar '10
      A young woman is found murdered in a hotel and the evidence leads to a medical student.
    • 16. Innocence

      15 Mar '10
      A man is convicted of a hate crime for allegedly killing a gay man, but a group called the Innocence Coalition is determined to clear his name.
    • 17. Four Cops Shot

      22 Mar '10
      The debate rages over how to treat an informant who shot and killed four police officers. However, did one of the officers try to put undue pressure on him to help catch a dangerous criminal?
    • 18. Brazil

      29 Mar '10
      When an environmental scientist, Dr. Oscar Silva, is poisoned during a global warming symposium, Detectives Cyrus Lupo and Kevin Bernard initially suspect competitors from Dr. Silva's field of study. It is soon discovered that Dr. Silva is involved in a messy custody battle with his wife’s ex-husband, Phillip Shoemaker and the focus of the investigation quickly shifts to the victim’s family. Meanwhile, the case becomes personal for Cutter as it stirs up unpleasant memories from his own past.
    • 19. Crashers

      03 May '10
      When the body of a model is found burning in an alley, Detectives Lupo and Bernard search for her killer.
    • 20. The Taxman Cometh

      10 May '10
    • 21. Immortal

      17 May '10
      A man's double life is discovered after he is stabbed to death.
    • 22. Love Eternal

      17 May '10
      A reality TV crew finds a dead body locked in a dog cage.
    • 23. Rubber Room

      24 May '10
      Series finale. A terrorist threatens students.