Friday and Gannon have good reason to believe that a mobbed up guy, George Fox, has killed a mob subordinate as part of an extortion plan going wrong. They have the evidence they need, but they just need the suspect to confirm what they think they know. They call the mobster Fox downtown for what turns into an interrogation. In this episode it is not the hot lights and threat of violence that gets the truth out of the mobster, but scientific methods that prove he could be the only one who did it.
This is an interesting episode for several reasons - First, the entire episode occurs in one room at the precinct as police interrogation methods are on display. Second, this LA mobster sounds like he is one of Tony Soprano's crew, not somebody from LA. Finally, the person that Fox is supposed to have killed was being played by a well known supporting player of the 50s through the 70s on TV and in films, Sam Edwards. There are photos shown of him and even a recording with Edwards' voice. So when he didn't appear, at least in a flash back, I was surprised. Why hire a well known supporting player to do a job where no acting is involved? I'm guessing that the initial script called for a flashback and it was cut in the final draft. It's the only thing that makes sense.