(written from a Production point of view)
A script is a written version of a film (also known as a screenplay) or television episode (also known as a teleplay), used in the creation of that filmed product. Many Star Trek scripts have been written, some using a working title. Scripts have been used in the creation of all the Star Trek TV series and films.
Scripts typically proceed from a story outline. Scripts are then revised through a series of drafts, each draft given a new color for revision pages. A first draft script initially has completely white pages, though the first draft's colored change pages are later collated with these. Changes to pages, as regards both dialogue and stage directions, are indicated using asterisks on the right side of the page. For the Star Trek TV episodes, most scripts cycled through three or fewer drafts before a final draft was created. Often on Star Trek: Voyager and Star Trek: Enterprise, the first draft didn't encompass the entire episode, with one or more acts still to be written and added. For ENT, an archive copy was created and saved in post-production. A writer's draft script is the last (or pending) version from a freelance writer's own hands who is not on the relevant writing staff, and the story hasn't yet been subjected to the whole room to break.
In four episodes of Star Trek: The Next Generation, scripts can be seen in the background during the filming of episodes. In "Suddenly Human" a script can be seen in sickbay, in "Violations" a script was lying on the steps during a dream sequence, in "Ethics" a script was featured on the floor of the cargo bay, and in "Cost of Living" a script was forgotten on the bed in the guest quarters. 
|Library of script excerpts|
- Reference books: