Anyway, I've also worked on shows where the scripts are constantly running late, or being significantly rewritten at the last second, and this is a nightmare. But it happens sometimes, for whatever reason... the writing side is just not going well and the scripts are taking too long to pull together, or maybe the showrunner sucks and is not up to the task of getting this show running smoothly, or the network drags their feet with notes/approvals and throws things into chaos by swinging in at the last possible second with edicts that upend everything (I was once working on a serialized network show with some mystery arcs. THE NIGHT BEFORE we were going to shoot a scene for a mid-season episode, to pay off HALF A SEASON OF METICULOUSLY PLANNED BUILDUP on one leads mysterious backstory, the network exec said they had decided they hated what the reveal was and wanted that character to have a different backstory. This is at the end of the business day, so the writers had to spend that night trying to come up with a completely different idea, that would somehow also fit all the many clues and setup that had already been shot, that could be shot with the cast booked for the next day, in the locations already selected. As you might imagine, they did the best they could, but the resulting new pages were awful. Then these new pages are given to the actors in the morning, and shot immediately. The guest cast was now totally wrong for the way their roles had been reconceived, but it was so last minute, there was nothing to do but have them play these now-severely-miscast parts. And suddenly the series regular is told that the truth of her character is totally different than what she had been playing all year. And she has about an hour to assimilate that before going before cameras and shooting these new big dramatic scenes that she has just been handed. It was bad! But this stuff happens. You would be surprised by how many similar stories I have)