Luke Mason

Luke, Jet's thirty‑year‑old brother and a dad, confronts Jet at the fair, hands back JJ's wig, and later helps her at their parents' booth. Luke rushes into the room after Jet awakens, attempts to lighten the mood and assists the family. Luke is present during the family debate, urging Jet to make a decision. Luke drives the truck to the house, remains silent, and provides spare gym clothing for Jet. Provides Jet with a sandwich, jokes about her kidneys, and mentions the family forensic‑cleanup business. Luke is present near Jet’s room, hissing ‘Let her sleep’ as the parents move past her bedroom. Shows hand graze from construction site, provides alibi. Luke’s kidneys are failing and his knuckles show unexplained cuts he previously denied. Luke plans to sell the family company to Nell Jankowski and demolishes the family home. Luke, Jet’s brother, confronts her while she dismantles his foundation and attempts to call their father and the police. Luke provides Tylenol dosage for Cameron, reveals phone code, and shows Sophia’s messages that contradict her alibi Luke interacts with his son Jack about the Patriots game and participates in the family discussion about Jet’s situation. Supposed to be with Sophia at the house watching TV at 10:52 p.m. Luke reveals the true succession plan for Mason Construction and offers to donate a kidney to Jet. Luke is revealed to be responsible for payroll, tax, and workers' compensation filings and to be committing multiple frauds. Luke's office was part of the building that caught fire. Luke is identified as the source of off‑books payments to Henry, responsible for the injuries and for threatening Henry to stay silent. Luke is revealed to have remained at the fire scene throughout the night, receiving breakfast from his mother. New speculation suggests Luke may have been in the pool before Emily drowned, based on his mother’s note and Billy’s recollection of a chlorine smell. Luke is mentioned in the heated argument, with Jet questioning his role in the company and his moral standing. Luke is referenced as the possible photographer who took the picture of Jet's truck near Mason Construction. Luke is located at Mason Construction, confronts Jet about the fire and his motives, and reveals he was present at the site. Luke is discussed as the possible lead to the killer and as having a secret father who may be the murderer. Luke is implicated in Emily's death and received a fabricated alibi from his father.