The squad investigates the death of a 99-year-old man who has been shot in the head sitting in his home. The case, which resembles a crime that happened in Tulsa three years ago, offers Grace and Perry an opportunity to utilize their expertise in gambling-related crimes from the vice days.  It also gives Bobby a chance to reconnect with his dad and Ham a chance to connect with a kindred spirit. But Grace’s attention is drawn towards Rhetta when she learns something unexpected about Ronnie.

The squad investigates the death of a parole officer with a secret life, while Grace and her brother Johnny finally track down Neely, the young addict who shares visions of Earl. And Rhetta decides to make some personal changes in the wake of her troubles at home.

Summer finale. A prominent doctor fatally wounds an intruder in his house, but Grace feels the doctor's story isn't exact. Ham breaks some interesting news to Grace, and Earl tells her she will need to help Neely.

The team is focused on a series of brutal home break-ins, but the latest one seems different than the others. Meanwhile, Matthew, a fellow angel of Earl's, is having trouble saving souls, and hones in on Earl's space.

Butch's reporter girlfriend covers the bizarre slaying of a drug company whistle blower in hopes for a big national scoop. Elsewhere, Grace's brother believes his neighbor has a dead body inside his home; and Johnny hopes to finally meet Grace's last-chance angel.

Grace pursues a rape and kidnapping suspect on foot and disappears, possible as a victim herself. But nothing concerning this seems to make sense, including how Earl works the works the investigation. Ham and Rhetta must team up to find Grace before a shocking ending which will leave a lasting impression on the series.

A friend of Grace's doesn't want any help in the possible murder of her husband. The squad has little time to waste in trying to track down and a missing person with brain damage. Grace tries to find out exactly when Earl began following her.

Grace returns to Oklahoma City long rejuvenated and with a new perspective on how to deal with crime. Her family is still trying to grasp with exactly what happened.

Grace ends up in the middle of what could be a plot by an anti-government group linked to the recent death of a police officer, as she reaches out to Neely, the young drug addict who shares visions of Earl. Grace's clumsy, off-the-books investigation causes Neely to become injured. Meanwhile, Grace and ham get caught in a compromising position, and Butch makes a surprise announcement.

Grace and her crew investigate the unusual suicide of a court reporter, and conclude the crime was staged. Elsewhere, Grace tries forming a bond with Neely, despite the fragile physical state of the young drug abuser; and Rhetta is close to losing something very special to her.

A bomb explodes at the church run by Grace's brother,, making the case personal for her. Meanwhile, Rhetta is haunted by family problems, causing her to search for a family time capsule she and Grace buried as children. And, Grace keeps a watch at Neely's bedside.

Grace must cope with survivor's guilt after a fall off a building. Captain Perry has an announcement that could change everything. The squad looks into a murder mystery.

In the immediate aftermath of Grace and Neely’s survived fall from the top of a building, Grace, now known as “Angel Cop” by the city, decides to have it out with God once and for all. But a mysterious stranger might have something to say about that. Ham struggles with his father over the fact that Ham is now dating his dead brother’s widow. And the squad investigates a deadly mauling by a dog.

As Grace deals with the aftermath of her dramatic fall from a building with Neely, she also struggles with the impending death of her grandfather, GeePaw (guest star August Schellenberg). Meanwhile the squad investigates a double homicide involving a water dispute between two ranchers, and Rhetta discovers a secret about her daughter.

During a case that puts Grace’s spirituality to the test, the squad investigates the murder of a Hasidic Jew whose body is found near a herd of dead cows. Meanwhile, Grace tries to connect with Neely, and Ham’s sister-in-law, Amanda, struggles to get over the death of her husband.

Grace gets to see a new side of her nephew when a rock band is related to the murder case. Neely lives next door to Grace and begins withdrawal with help from Earl. Rhetta continues where she left off with Ronnie.

Everybody can't figure out why Capt. Perry seems to be on an edge all the time. Rhetta and Ronnie learn to communicate better since the start of their relationship with Johnny.

Grace has trouble dealing with a food issue and doesn't go to anybody for help to deal with it. Neely's having trouble when her drug problem spirals out of control. A friend of Butch's needs help getting out of a tough situation.

Grace may be able to tell God all the things she has done through her life because of her bond with Earl.