I watch very little TV, but the shows that I have seen about the legal system vary in how accurate they are, some are almost completely fantasy, others were clearly put together by people who have worked in the legal system and are pretty accurate.
Almost all of the shows, the more, and less accurate, usually get one thing wrong, and that is how long cases take to move through the system. TV shows about criminal law usually go from arrest to trial in the same episode, making it seem like there is just a matter of days between the two events. That is understandable, as TV viewers do not want to watch months of routine hearings, wrangles over exchange of information, and other mundane aspects of the real-world legal system. In the real world, for the minority of cases that go to trial, the trial rarely occurs less than a year before the arrest or filing of initial charges. During that time important events occur, exchange of information, investigation of the case, and motions to the court asking the judge to take certain actions or dismiss the case. That action is important, most work in any case happens outside of the trial, but, for TV purposes, the trials are more exciting, and they are understandably focused on.
Enjoy the TV legal dramas, but remember, most of the action happens outside of court, and for cases that get to trial, real world lawyers, judges, and witnesses do not look like your favorite TV star. I wish I could say that I looked like Brad Pitt but it would not be honest if I did.
Ed