The District - Season 4

Mannion returns to Washington, D.C. to get his job back and moves into a building slated for demolition; Mannion works outside the system to clear Temple of a murder charge.

Mannion sees a chance to get his job back when the new police chief orders a drug raid that results in the death of an elderly woman.

An ex-convict is a suspect when his girlfriend is discovered to have fallen to her death from a third story apartment window; Mannion tries to talk to Sherry into working for him and Temple sets a trap for a pair of police officers he suspects of using excessive force on suspects.

The team searches the world of online chat rooms for Noland's niece when an Internet predator convinces her to run away from home. Meanwhile, Temple is picked on by fellow officers for his part in bringing down a pair of violent cops.

A community creates its own underground form of street justice after getting fed up with the judicial system; Mannion tracks down the person who received Ella's heart; Temple hires a lawyer to defend him in a wrongful death suit and Nancy and Brander prepare for a test to become detectives.

Mannion and the team reopen a seventeen year old cold case due to finding a young woman murdered in the streets of D.C. It is strikingly similar to those committed by the serial killer "Jupiter," who was never caught and may have re-emerged.

When a man is murdered during a Civil War re-enactment, Mannion discovers an ancient resentment might have played a part in the crime. Meanwhile, Vanessa confronts Sherry after one of her clients is wounded in a botched sting operation and Noland uncovers surprising news while tracing his ancestry.

Ricky and a friend end up in the hospital after they collapse during a birthday party. It seems the children accidentally ingested drugs, so Mannion tracks down the culprits; Clive and Ella's sister fight over Ricky's custody; The ongoing Lester Richards case shakes up Debreno and Temple's friendship; Brander and Cutter track down an ATM thief.

Mannion sees a vision of the Virgin Mary on the window of his apartment building before money from a 46 year old robbery falls from the sky. He soon realizes that a modern day Robin Hood is at work when thousands of dollars worth of clothes also come tumbling down. Meanwhile, Temple's wrongful death case goes to trial.

Mannion must determine if the teenage boy who received Ella's heart is guilty of a gas station robbery that ended in the attendant's death. Temple's day turns very sour when the mayor decides not to pick up the court fees after the Lester Richards case. Meanwhile, Nancy and her mom are attacked by carjackers, or are they?

A lawyer and his wife are killed in their home; the only witness is their autistic daughter. Mannion calls on former F.B.I. hostage negotiator Tommy Morgan to try and get through to the girl and discover the killer's identity.

A car hits an officer during a traffic stop, and Mannion suspects his partner did not attempt mouth to mouth resuscitation because the downed officer is gay. The car in connection with the hit and run is traced to students performing lewd sexual acts without their victims' knowledge, then posting the videos on the internet.

Mannion probes the apparent suicide by hanging of a congressional lobbyist who was about to reveal the names of top officials involved in the exchange of sexual favors for votes. The case gets personal for Mannion when he discovers that the woman's ghost writer is a disgraced journalist who was once engaged to the chief's daughter. Also, a school teacher fights for health care reforms for students and families.

A woman in the Witness Protection Program is killed in a hit and run accident, leaving Mannion to wonder if she was murdered. He also gets a sandwich named after him at a restaurant, but several people get sick from eating it. Meanwhile, Temple works after hours as a security guard and prepares for an ambassador's reception.

An old man is killed while visiting the Korean War memorial. Jack Mannion's team discover that he was living under an assumed identity and was actually Ella Farmer's uncle, who was a suspect in a 1940s murder case. The team try to solve both cases to find the truth. Meanwhile, Mannion refuses to let Sherry move into Ella's old office.

Mannion believes his fencing instructor's claim that she killed her husband in self-defense, while Debreno discovers that an old friend who apparently died in an accident five years ago could still be alive and on the streets.

A little girl is kidnapped, and in tracking down suspects Manion's ex-wife Sherry gets seriously wounded in a gun battle with one of the suspects. As the crisis unfolds, Manion begins to suspect that the little girl's family might not be telling their full story.

Mannion flies to Iowa when a warrant for his arrest is issued for failure to pay a fine and he gets involved in a murder case where a newlywed is accused of killing her husband on their honeymoon, the woman being an ex-girlfriend of Brander's. Meanwhile, back in D.C., Temple's investigation of an armored truck robbery is complicated by his feelings for the woman in charge of security.

A woman shoots a doctor at point blank range, claiming he quickened her mother's death after being named sole beneficiary in her will. In other events, Nancy's ill father asks her to help end his life when he's unable to take care of himself and Mannion gets obsessed with figuring out who keeps leaving notes in a suggestion box criticizing his wardrobe.

Mannion investigates a gang shooting outside a church and Gwen suspects that one of the boys may be the son who was taken away from her.

Noland is shot by a gang member in apparent retaliation for Mannion's takedown of an area gang. After getting a look at the shooter, Mannion believes it's Tico, Maria's brother, leading her to clash with Debreno.

Manion struggles to ready himself for his daughter's wedding and to get to the church on time. Debreno and Temple work separate cases involving two murdered women, which Brander manages to provide the key lead to solve the case. In appreciation, he is promoted to detective.