She discovers inside the manuscript for “Nocturnal Animals,” a novel — dedicated to Susan, in fact — by her ex-husband Edward Sheffield (Jake Gyllenhaal.) This was Edward’s nickname for her.

Peter Sarsgaard, known for the thriller “Coup!” (2023), portrays the president of ABC Sports Roone Arledge and John Magaro, known for his role in “Past Lives” (2023), plays Geoffrey Mason ...