IT’S THE ECONOMY, STUPID!

The principle of economics (unity+story)

This is about spending the least to gain the most. And this is a really beautiful principle, because it not only help you to increase the chances of your script being produced as it will be a more financial appealing project, but also because the construction and cohesiveness of the script will be more convincing.
It’s about using the same locations, characters and ideas over and over again, and thus it goes hand in hand with the principle of unity, if it’s not really just another way of looking at the same fundamental quality of drama.
It also relates to the principle of story, because you will focus on being economical in starting it, developing it and ending it, meaning that when you introduce a character, you have to ask where he is going and where he is ending up. Neither leaving him as an unfinished story or over-story him in different directions.
Every time we introduce something new in a script it will cost us – time, money and energy. We will spend an amount of the script’s time in presenting the location, character or idea. We will spend production money on moving to a new location/creating an extra set-piece, hiring another actor or simply shooting/rehearsing something extra. And even more importantly we will spend the audiences’ mental energy on grasping this new locale, person or idea. On the other hand when we are using the same characters, locations or ideas, by elaborating on them, extending them, we add to them, and thereby increase our investment in them. We will be able to develop and show new aspect or depths, without spending as much time, money or energy, as we would have by introducing a new. Unless you have good reason, you should never introduce a new character, location or idea. Always check your script – as you develop it – to see if you can merge characters, re-use locations and streamline or connect your ideas into one.
It is also beneficial for the director, especially when we talk films or TV, as he or she will save energy (by not spending it on moving to new locations, dealing with new characters/actors) and can focus on getting the most out of the script in terms of acting and staging.
Many scripts look good for the first 30-60 pages, but then when closing time begins after the mid-point, they fail to do so, and this problem be could solved if this principle was adhered to. It happens either because they have introduced too many elements and forget or are unable to finish them, or because they keep introducing new elements.