The early seasons of NBC’s courtroom comedy saw plenty of cast turnover, with several public defenders and bailiffs cycling in and out before Markie Post and Marsha Warfield took over as Christine and Roz in Seasons 3 and 4, respectively.

Christine was an idealistic, maybe overly chipper defense attorney who sparred memorably with lecherous prosecutor Dan Fielding, and Roz brought a tough, no-B.S. energy to the courtroom as the new bailiff. With these two in place for the rest of the series’ run, "Night Court" finally settled on the core ensemble we know and love.

https://tvline.com/lists/best-tv-characters-late-cast-additions-seinfeld-buffy-the-office/best-tv-characters-late-cast-additions-christine-roz-night-court/

I’m in the vast minority, but I prefer the first two seasons. The show was more “gritty” looking and looked like a true Night Court. I much preferred Liz and Billie over Christine. I really like Selma, but it wasn’t the show’s fault she passed away, but she added so much

As the seasons progressed, the “gritty” look vanished.

I mean, the Christine and Roz years lasted way longer, but I just felt a lot of the show’s “bite” died when Liz, Billie, and Selma departed (however, I agree that Sheila and Lana simply didn’t work).

I’m a nut for continuity and hated the fact that there was no explanation for the absences of Sheila, Lana, Liz, or Billie.