S4E8 · The Nadir

Complete story — includes the ending

Oraetta receives news that Dr. Harvard has survived his poisoning and is expected to make a full recovery. Hastily packing her bags, she finds Ethelrida's notebook in her apartment. Comparing its handwriting to the letter she pulled from Harvard's desk, she deduces that Ethelrida wrote the letter. Josto arrives at his compound and is horrified to find Gaetano there. Gaetano beats him, but then professes his admiration for Josto's attempt to have him killed and pledges his loyalty to his brother, finally accepting his leadership. Learning his plan has backfired and united the brothers against him, Loy calls in his favor from the Fargo Mafia. Deafy confronts Loy, demanding the whereabouts of Zelmare and Swanee. Loy initially resists out of obligation to his sense of honor, but Deafy mocks his code and ultimately intimidates Loy into revealing that the duo will be taking the 10pm train to Philadelphia. Deafy assembles a squad to arrest the pair. Odis, claiming to want a return to his life as a cop and be a crook no longer, accompanies the raid, but is incapacitated by his OCD when it commences. Zelmare and Swanee make a last stand, killing many cops and civilians alike. Odis finally works up the courage to enter the station, and finds Deafy just as he has cornered the outlaws. Still acting under orders from Loy, he shoots Deafy dead. He then turns his gun on the women, killing Swanee. An enraged Zelmare manages to push past Odis and escape. While visiting their mother's house, Josto and Gaetano are ambushed by Mort Kellerman and his Fargo soldiers. Gaetano manages to singlehandedly push them back, but the brothers are devastated to learn that their mother was killed in the crossfire.