In the season premiere, a community parade turns deadly.

An old colleague returns to Jane's dismay.

Michael wants to help a woman he once romanced under Division orders, who is in danger.

A brutal assault in the street leads Carisi to pursue hate crime charges. Benson must support a homebound witness too scared to speak up.

Simon’s mother asks Alec to help stop a suicide contagion when a third student death strikes the campus. Alec ask Marisa to help when he thinks there might be more to the case.

Shaw risks being detected by Samaritan to save a POI.

Reese poses as a police academy instructor to save a POI.

Riggs and Murtaugh respond to the death of a plastic surgeon, drawing them into a case involving an illegal drug ring run out of a wellness clinic. Things heat up when Palmer from the DEA and Riggs compete to solve the case first.

Sammy & Nate get into a deadly gang confrontation. Ben makes a series of rookie mistakes and Lydia works a gang homicide that leads to an unorthodox killer.

A brutal assault in the street leads Carisi to pursue hate crime charges. Benson must support a homebound witness too scared to speak up.

Shaw risks being detected by Samaritan to save a POI.

Reese poses as a police academy instructor to save a POI.

911 Dispatch Trainee Matt Reinke is almost through the training program at CVD, but before he graduates, he must prove his ability to successfully navigate the night shift, the callers, and his fellow dispatchers.

Michael wants to help a woman he once romanced under Division orders, who is in danger.

In the season premiere, a community parade turns deadly.

An old colleague returns to Jane's dismay.

Riggs and Murtaugh respond to the death of a plastic surgeon, drawing them into a case involving an illegal drug ring run out of a wellness clinic. Things heat up when Palmer from the DEA and Riggs compete to solve the case first.

Sammy & Nate get into a deadly gang confrontation. Ben makes a series of rookie mistakes and Lydia works a gang homicide that leads to an unorthodox killer.

Reese poses as a police academy instructor to save a POI.

On her last shift at CVD, veteran 911 dispatcher Christine Mazzeo must navigate the chaos of St. Patrick’s Day and say goodbye to the work-family she’s been with through thick and thin over 12 years.

Michael wants to help a woman he once romanced under Division orders, who is in danger.

A teenager found unconscious in the park leads to a missing persons investigation. Benson must help Noah come to terms with his past when he questions the origins of his birth.

Murtaugh and Riggs investigate the mysterious death of famous singer Shaye's bodyguard. Meanwhile, Riggs learns the responsibilities that come with being in a relationship with help from Murtaugh.

Lydia and Josie catch a complicated rape case on the Westside. John bonds with an abandoned teenager, while also having to deal with testifying at his own father's parole hearing.

Dena’s depraved scheme reaches new depths. The police are still fighting to get to the bottom of Julian Webb’s death. After four years on the run, Lee Wyatt begins to piece together that he has in fact been a victim of his own wife’s manipulative scheme.

Simon’s mother asks Alec to help stop a suicide contagion when a third student death strikes the campus. Alec ask Marisa to help when he thinks there might be more to the case.

After Birkhoff finds Nikita's birth certificate, Nikita and Michael track down her father. Percy tells Alex the black box could help her avenge her father's death.

Murtaugh and Riggs investigate the mysterious death of famous singer Shaye's bodyguard. Meanwhile, Riggs learns the responsibilities that come with being in a relationship with help from Murtaugh.

Lydia and Josie catch a complicated rape case on the Westside. John bonds with an abandoned teenager, while also having to deal with testifying at his own father's parole hearing.

Dena’s depraved scheme reaches new depths. The police are still fighting to get to the bottom of Julian Webb’s death. After four years on the run, Lee Wyatt begins to piece together that he has in fact been a victim of his own wife’s manipulative scheme.