After discovering Judd Davis’s strangled body hidden in Edith Gerhardt’s bathroom, Anna tells Seamus she believes either Jack Lapsford or Sal attacked Reggie Davis in the galley and then killed Judd. She favors Lapsford, citing his earlier fake heart attack, eagerness to get off the train, and indifference to the Judd search, which could indicate he already knew Judd was dead. Anna decides to confront Lapsford and Sal alone, carrying Reggie’s gun, while Seamus and Dante move Judd’s body back to his room.

Seamus and Dante return Judd’s corpse to Room C. The effort rattles Seamus, whose hands shake badly. Seeking a moment alone, he goes to the observation car, where a storm outside triggers a childhood memory of being rescued in a blizzard by his brother, Sean. Feeling lost without Sean, Seamus’s tremors worsen. He takes out a pillbox, considers another dose, but stops when he hears Anna urgently calling his name.

Anna drags Seamus toward the previous car, saying Lapsford is having a heart attack and that this time it appears real. They join Dante and Sal, who are helping Lapsford back to his room. On the bed, Lapsford gasps for air with an irregular pulse, and Seamus confirms the emergency. Seamus produces a muscle relaxant from his pillbox and gives it to Anna to administer, hoping it will slow Lapsford’s heartbeat until they reach Chicago.

Noticing Lapsford’s desperate focus on the pill, Anna withholds it to interrogate him. She demands to know if he “did it” for money and whether he thinks about her ruined family. Lapsford rasps “yes” to the money and gives faint nods when asked about the devastation to Anna’s family and the soldiers killed, including Seamus’s brother. Seamus, torn between rage and duty, urges Anna to give the pill as Lapsford fades.

As Lapsford’s breathing becomes nearly undetectable and his eyes dim, Seamus snatches the pill, forces it into Lapsford’s mouth, and washes it down with water. After violent coughing, Lapsford’s breathing steadies, and his pulse calms. The success fills Seamus with conflicting feelings about whether Lapsford should live or die for his role in past crimes.

When Lapsford finally speaks, he tells Seamus, “You should have let me die,” underscoring his awareness of guilt and the bleak stakes as the train continues toward Chicago with multiple murders still unresolved and a possible killer among the remaining witnesses.