Chucky Pancamo is visible in the background of a scene when Omar White moves into Kareem Said's pod, when he should be in the hospital ward after being stabbed by Robson, in an earlier scene.
While Said is admonishing the new inmate in the cafeteria, another Muslim, in a gray sweatshirt, appears behind the new man, then disappears before reappearing in the next shot.
When O'Reilly tells Stanton that Montgomery ratted on him, Montgomery runs to the library to kill Montgomery. Only problem is that O'Reilly was supposed to meet Montgomery to discuss payment methods. O'Reilly never told Stanton where Montgomery was going to be, yet Stanton runs right to him.
Right at the end of the episode where Timmy Kirk is talking about a memorial service for Jim Burns. In the background we hear Shaun Murphy say "Lights Out", yet Murphy says that only in Em City.