Scripts change in TV. They change a lot.
The first draft distributed to department heads is usually just a rough guide. You know, so location managers can start scouting, construction crews can start building, casting directors can start casting.
That draft will be rewritten at least a half dozen times before filming begins. Sometimes these changes are as minor as a dialogue tweak, or as major as a completely new plot.
(Those kind of rewrites are the most fun to watch, as the producers scramble to find a story that works in the sets that they’ve built and the actors they’ve already got under contract.)
As you might imagine, this wastes a lot of paper. It would waste even more if we reprinted the entire script every time.
But we don’t. Instead, we “run pages:” copying only the pages that have changed. (Up to a certain point; if 49 pages of a 53 page script have changed, we print the whole thing.)
Each new draft (whether a full draft or merely revisions) gets copied onto a new color. Every show does it slightly differently, but a common pattern is white, blue, yellow, green, pink, then back around to 2nd white. Some shows use more colors, like salmon and goldenrod, if they know they rewrite a lot.
The purpose of these colors (besides identifying a particular draft), is so that everybody can see everyone else is, literally, on the same page. If your page is yellow, and eight people around you have pink pages, something’s wrong.
All of this exposition is just so I can engage in my favorite past time– complaining about actors.
What many (many) actors do is call the office and ask, “Hey, uh, could I get a collated script?”
Or, they’ll get a PA or 2nd AD to call: “Hey, actor X needs a collated script.” I think they think it sounds more official or something.
You could say, “But TAPA, collating a script isn’t that hard! What are you complaining about?”
You’re right, it’s not hard. And that’s exactly my point.
Actors have few responsibilities. Memorize your lines. Show up on set. Don’t get arrested.
Collating a script is about the only physical activity an actor is required to do, especially on a talky show like the one I work on. Seriously, why can’t they do this for themselves?