Real-life brothers-in-law Jake Gyllenhaal and Peter Sarsgaard are adversaries in ‘Presumed Innocent’

Occasionally, while filming an intense courtroom scene for his new series, Jake Gyllenhaal would catch his “Presumed Innocent” co-star Peter Sarsgaard glaring at him from across the room. “It was just funny,” recalled Gyllenhaal in a recent interview alongside Sarsgaard, doing a quick impression of Sarsgaard’s stare. “It’s like, ‘OK, OK,’” joked Gyllenhaal as if to say ”tone it down” as Sarsgaard cackled at the commentary. The two rib each other like family because they are family. Sarsgaard is married …