This is one of the most pivotal scenes in the pilot of Homicide: Life on the Street. This is the moment that introduces one of the most significant elements in the show - "the box." Scenes in the interrogation room are among the most dramatic in the entire series run, and no one was better in the box that Andre Braugher's Frank Pembleton.
In this scene, rookie detective Tim Bayliss sits in on an interrogation and gets his first taste of how Frank operates. It's not only an incredibly well-written sequence, but it's well-acted. (Note actor Kyle Secor's reactions as Bayliss.)
It's probably worth noting that at the time Homicide premiered, there hadn't been many realistic police dramas, and most often, interrogations were scenes where the cops would flatly confront the suspects with what they knew in an effort to intimidate them, or they'd just flat out resort to threats of violence. This is something much more well-crafted. Watch the scene and pay attention to everything we learn about Frank and Tim during this sequence, both as individuals and their dynamic together.