Mr. Hoyt is the District Attorney of Latham County who prosecuted the New York Four (Jerry Seinfeld, Elaine Benes, George Costanza, and Cosmo Kramer) with Jackie Chiles as their lawyer.
Starting in "The Finale, Part 1," he talks with his people stating that Latham is going to be swarming with different medias when this trial is over as the whole country will be watching. He then quotes to his people "Now we got to do whatever it takes to win it, no matter what the cost. The big issue in this trial is going to be character. I want you to find out everything you can about these people - and I mean everything."
In "The Finale, Part 2," District Attorney Hoyt does his opening statement by stating that the Good Samaritan law was passed by the City Council last year and vows that they will pay. After hearing the testimonies of Officer Matt Vogel and Howie, he calls Mabel Choate to the stand. As Jackie objects to this because Mabel wasn't there, District Attorney Hoyt states that the prosecution has gone to great lengths to find the character witnesses claiming that how they interacted with the defendants is part of an anti-social behavior that's been going on for years. Judge Arthur Vandelay overrules the objection so that he can hear what Mabel Choate has to say. District Attorney Hoyt then talks with other character witnesses that the prosecution has rounded up.
James Rebhorn portrayed him.