In the series finale, Grace undergoes a grand spiritual metamorphosis and journeys back to Oklahoma City. With sheer determination and a newfound sense of purpose, she sets out to vanquish evil.

Grace shuts herself off completely from family and friends as a past tragic event continues to haunt her. Meanwhile, an old friend pulls Butch into a potentially destructive position, and Neely's effort to resist drugs reaches its decisive moment.

The aftermath of a tragic event leaves Grace wracked with guilt. Meanwhile, the team investigates a beheading, and Capt. Perry delivers big news.

Grace struggles with the burden being placed on her, especially after the family members of a dead rodeo rider bring his body to Grace's house, hopeful that the "Angel Cop" will be able to find out how he died. Meanwhile, Capt. Perry braces for a significant life change; and Grace's brother Father John teaches the art of good communication to Rhetta and Ronnie.

With the celestial Earl in her corner, Grace must answer to a higher authority and deal with the judgment of her past behavior.

A murder spins around a rock band. Elsewhere, Neely becomes Grace's next-door neighbor as Earl tries to pull her through punishing drug withdrawal. And Rhetta focuses on reconciling with her husband.

Grace reconnects with a childhood friend who is charged with killing her husband. Grace investigates and soon realizes there's much more to the situation than meets the eye. Meanwhile, the crime crew investigates the vanishing of a young woman; and Grace surmises that Earl's been observing her since she was a child.

Grace deals with life problems, including the residual impact of her plummet from a building with Neely and the looming death of her grandfather. Meanwhile, the team probes two slayings related to a water dispute; secrets surface about Rhetta's daughter.

Grace---who's now been given the moniker "Angel Cop"---inches closer to her spiritual destiny. Meanwhile, family divisions result when Ham dates his late brother's widow; and the crew probes a fatal attack by a dog.

Grace digs for clues after a distinguished doctor kills an intruder in his home, but the doctor's version of events raises questions. Elsewhere, tension between Rhetta and Ronnie reaches the breaking point; Ham surprises Grace with big news; and Earl instructs Grace to help Neely.

Hushed and harbored secrets are exposed when the team explores the death of a parole officer. Meanwhile, Grace teams with her brother in a search for Earl-connected addict Neely. And serious home troubles compel Rhetta to make monumental life changes.

Butch's reporter girlfriend Kendra hopes for a big national scoop when she covers the bizarre slaying of a drug-company whistle-blower. Elsewhere, Grace's brother Leo suspects that his neighbor is hiding a dead body in his house; and Johnny hopes to finally meet Grace's last-chance angel.

The team investigates the shooting death of a 99-year-old man---an act possibly modeled after a crime committed in Tulsa years earlier. Meanwhile, Bobby sets out to reconnect with his father; and Grace chances upon Rhetta's husband in a compromising situation.

Grace pursues a rape and kidnapping suspect on foot---only to suddenly vanish, ostensibly as the suspect's newest victim. Ham, Rhetta and even the angelic Earl desperately set out to find her.

In a case that sorely challenges Grace's spiritual beliefs, the team scrutinizes the slaying of a Hasidic Jew found near a herd of deceased cows. Elsewhere, Grace continues her efforts to establish a rapport with Neely; and Ham's sister-in-law grapples with her husband's death.

The team focuses on a series of home invasions. Elsewhere, Grace encounters a downcast angel named Matthew, who tempts her with an intriguing offer.

A case turns explosively personal for Grace when a bomb detonates at her brother's church. Meanwhile, family problems haunt Rhetta, who seeks comfort by searching for a nostalgic time capsule she and Grace buried as children. And Grace keeps a bedside watch on Neely.

Grace and her team scrutinize the puzzling suicide of a court reporter, only to suspect that the crime was staged. Elsewhere, Grace tries to form a bond with Neely, despite the young drug abuser's fragile physical state; and Rhetta is on the verge of losing something very dear to her.

Grace is investigating an antigovernment faction and trying to form an alliance with a young female drug user who shares a connection with angelic Earl. But Grace's haphazard investigation goes awry, resulting in an injury to the woman. Meanwhile, Grace and Ham get caught in an embarrassing situation; and Butch offers surprising news.