Series finale: Lights goes to war with Death Row Reynolds for the heavyweight title. But first, Hal Brennan declares war on promoter Barry Word. Lights isn't opposed, but he does have a suggestion. Meanwhile, Word has one last prefight word for Lights, and Theresa runs into Death Row's wife, Jennifer (Reiko Aylesworth).
The word on the street is that Lights is going to throw the Reynolds fight, though it's news to Lights. Meanwhile, Lights gets a surprise visitor: his mother (Valerie Perrine), an alcoholic who left Pops for a drummer 17 years ago. Reaction in the family to her return is mixed.
The package Lights delivered for Hal Brennan comes back to haunt him when a politician tied to Brennan gets caught up in a prostitution scandal. Meanwhile, Lights tries to help a punch-drunk former champ (David Morse).
Lights' setback wins him little sympathy from either Death Row Reynolds or Barry Word. Meanwhile, Theresa makes a career decision as her graduation from medical school approaches; and Margaret Leary has a new boyfriend.
The training regimen Ed Romeo (Eamonn Walker) is imposing on Lights splits the Leary family: Theresa and the girls don't like its late-night hours, but they do like Ed. Johnny doesn't, and he's upset that Ed won't let Lights promote the Reynolds fight. For his part, Ed thinks that Lights' brother is "bleeding him dry."
After defeating Morales, Lights hires trainer Ed Romeo (Eamonn Walker), who once trained Death Row Reynolds. Romeo is part boxing guru and part psychologist, and his approach is very different from Pops'. Meanwhile, Theresa worries about Ava's attitude about life.
Lights keeps losing weight as the Morales fight nears, and Johnny thinks that their dad is overtraining him. The eye injury he suffered while sparring hasn't healed completely, either. And at home, Daniella, "the good girl," gets in trouble at school. Lights asks Theresa to be in his corner for the fight, and he gets unsolicited support from an unlikely corner: "Death Row" Reynolds (Billy Brown). "We've got this 'thing'," he tells Lights.
Lights misses his family after moving into a motel to train for his bout with Morales (Gavin-Keith Umeh) without distractions. No such luck. Reporter Mike Fumosa (Ben Shenkman) keeps pestering him about rumors about his activities in and out of the ring.
After a financial planner lands a haymaker, Lights decides he has to go back into the ring and manages to win Theresa's grudging approval. He then enlists the backing of Hal Brennan (Bill Irwin) in order to avoid Barry Word (Reg E. Cathey), and lines up an opponent with "glass hands."
In the wake of Omar's bout, Johnny is having major difficulty with promoter Barry Word's math. Johnny also finds himself in trouble with bookies, and Lights must bail him out. Meanwhile, Theresa pledges $50,000 for a clinic in Haiti.
While Johnny tries to persuade promoter Barry Word (Reg E. Cathey) to give the gym's top fighter (Pedro Pascal) a title shot, Lights' daughters prepare a scrapbook for their father's 40th birthday party. Meanwhile, police discover that the MP3 player found on the body of a murdered robber belongs to Lights.
Lights is threatened with criminal charges and must do the bidding of loan shark Hal Brennan (Bill Irwin) to make them go away while being circumspect with the suspicious Theresa, who has also heard rumors that he'll return to the ring. "Everyone's jittery these days," he tells her. Meanwhile, daughter Daniella puts two and two together about her father's pugilistic dementia, and daughter Katie has a dance recital coming up. But Brennan has other plans for Lights.
Holt McCallany plays Patrick "Lights" Leary, an ex-heavyweight champ who's scrambling to support his wife, Theresa (Catherine McCormack), a medical resident, and their three daughters. The series opener begins five years after Lights' retirement (at Theresa's insistence) following a controversial split-decision loss. The Learys live in a mansion, but he's going broke, and the IRS is after him and his manager-brother (Pablo Schreiber). Lights is also showing signs of "pugilistic dementia."