Detective Elliot Stabler returns to the NYPD to take on the city's most powerful crime syndicates after a devastating personal loss -- rebuilding his life, family and career while adapting to an evolving criminal justice system.
Stabler deals with big changes after an undercover assignment. Bell hires an adviser whose technology could revolutionise investigations. (S4, ep 1)
After a deadly mosque bombing claims the life of a spiritual leader, Stabler investigates the hate crime. Contains discriminatory content. (S4, ep 2)
Stabler and Officer Bashir track down a missing father and son who could lead to the answers they need. Bell relegates Reyes to desk duty. (S4, ep 3)
Bell and the team keep a witness and her family safe from Los Santos before she testifies. Stabler hosts a chaotic family dinner. (S4, ep 4)
A rescued victim from Stabler's past goes missing. Bell recovers in the hospital while Jet, Reyes and Bashir are all questioned by IAB. (S4, ep 5)
When several bodies wash up in a seaside town, Stabler navigates the politics of the tight-knit community to find the potential killer. (S4, ep 6)
The squad backs up Stabler in pursuing a murder case outside of their jurisdiction as an unlikely ally provides a key piece of evidence. (S4, ep 7)
Sins of our Father: As Bell's squad devises a strategy to investigate the Westbrook case, Chief Bonner grapples with unresolved questions about her past. (S4, ep 8)
Stabler leans into his military network to search for a Middle Eastern heroin pipeline making its way to the US. Meanwhile, Reyes returns. (S4, ep 9)
The team works to take down a large-scale drug operation disguised as a local honey farm. Randall searches for Joe Jr on his own. (S4, ep 10)
Stabler tries to keep his rank in the farm's inner circle when his biggest ally is questioned, as the team discovers the identity of their top target. (S4, ep 11)
Stabler and Randall give Joe Jr. the chance to get clean or go to prison. Vargas and Jet plan to cut off Emery's smuggling routes. (S4, ep 12)
When the ATF Bureau plans a raid of Redcoat's warehouse, Trisha helps Stabler keep Joe Jr safe, while Bell faces the man who killed Sam. (S4, ep 13)