The ninth year marks a turning point for The Major Case Squad when one of their own is murdered while working undercover in the world of illegal arms trafficking. In a two-part first episode, detectives Goren (Vincent D`Onofrio), Eames (Kathryn Erbe) and Nichols (Jeff Goldblum) go in search of the elusive killer and risk jeopardizing an ongoing FBI investigation that threatens to push Goren off the board forever. Year Nine takes a hit with a series of cases that include correspondence with an Irish crime boss, the investigation into a mysterious „vampire“ murder, the hunt for a schizophrenic serial killer, and the investigation into a widespread scandal with a New York senator. Law & Order: Criminal Intent is part of the most successful television franchise and was created by entertainment king Dick Wolf and ran for ten seasons.]] >After the first episode of the season, Vincent D`Onofrio, Kathryn Erbe and Eric Bogosian left the show. The character of Bogosian (Captain Daniel Ross) was killed in the first part of the first. Bogosian was replaced in the cast by Mary Elizabeth Mastrantonio, who played Captain Zoe Callas. Saffron Burrows joined the cast (as Detective Serena Stevens), replacing Julianne Nicholson (who was pregnant and had a child during filming), who played Detective Megan Wheeler.  Jeff Goldbum took the lead role. With illegal arms trafficking and a hunt for Somali terrorists in limbo, Detectives Goren, Eames, Nichols and newcomer Stevens are pooling their resources. The heart of their investigation is to bring Captain Ross` killer to justice. This is part 2 of the first episode of the season. Episodes from the ninth season of Law & Order: Criminal Intent also aired on NBC starting Sunday, June 20 at 10:00 p.m.
ET, with reruns of those episodes airing on Saturdays beginning June 26 at 8:00 p.m. ET.  Episodes aired on NBC until Sunday, September 5, 2010. Bravo began airing episodes of the ninth season early in the morning on Sundays of November 21 at 2:00 a.m. to 4:00 a.m. The stage cards return this season after three seasons. Detective Zach Nichols (Jeff Goldblum) carries a Kahr K9 as his handgun. He is particularly attracted to „Broad Channel“ (S9E03). At the time, the Kahr K9 was one of the handguns approved by the NYPD.
In „Loyalty, Part 1“ (S9E01), an FIM-43 Redeye is tested. An intermediate government official decides to blackmail two doctors who overbilled their clients. Doctors fear the scandal could lead to retired gangsters who funded their practice. Their fears seem to be dispelled when the agent is found dead – until Nichols and Stevens` investigation takes them straight to their door. A SIG-Sauer P238 is found when searching „Loyalty, Part 1“ (S9E01). Investigators are trying to stop illegal arms trafficking and track down Somali terrorists. A government official blackmails two doctors for overcharging patients before he was killed. However, doctors have another secret to protect and fear that someone will find out that the gangsters have funded their practice. A psychologist conducts a deadly experiment on a couple by forcing a man to kill himself or his wife.
The psychologist`s obsession stems from a similar decision his grandfather was forced to make while in a Nazi concentration camp. Inference. Goren and Eames clash with federal authorities over a murder investigation that involves a complex political power play while battling a loss. Four high school friends are blackmailed following the death of another friend. A group of childhood friends are blackmailed and one of them is left dead. Nichols and Stevens try to uncover the secret the friends are hiding, hoping it will lead them to the murderer. In Part 1 of the first episode of season 9, Goren and Eames investigate the murder of a wealthy businessman and his girlfriend who went on a pirate hunt off the coast of Africa. Elsewhere, Ross received a lucrative offer. Nichols has personal ties to a case when he investigates the murder of an old friend, an isolated bookseller with a troubled girl.
A mounted M240B is used aboard a touring yacht in „Loyalty, Part 1“ (S9E01). The career of an aspiring boxer is discovered by the police after his involvement in a dog fighting ring. Then his problems increase even more when his partner is found dead. Detectives investigate the death of a ballerina who attends a renowned conservatory in New York City. A deleted Walther PPK is used in both „Loyalty, Part 1“ (S9E01) and „Loyalty, Part 2“ (S9E02). A young girl from the Midwest is murdered after being treated at a medical center. In the season 9 finale, Nichols turns to his father (F. Murray Abraham) to help him find three suspects involved in the murder of a real estate agent. A new murder fits the style of a serial killer executed months earlier. Stevens must find out if the murder is a crime of imitation or if she helped convict an innocent man. Lorraine Bracco is a guest.
Nichols and Stevens track down the murderer of an NYPD detective. The investigation leads them to a small town under the control of an Irish mafia boss who is also Nichols` old enemy. A young girl who sought medical treatment after a robbery is murdered after leaving the facility. Nichols and Stevens pursue the killers, who appear to be sending a message. A body discovered on a construction site follows the pattern of an executed serial killer.