A script doctor is a writer or playwright hired by a film, television, or theatre production company to rewrite an existing script or improve specific aspects of it, including structure, characterization, dialogue, pacing, themes, and other elements.[1]
Script doctors generally do their work uncredited for a variety of commercial and artistic reasons.[examples needed][1][2][3] They are usually brought in for scripts that have been almost "green-lit"[4] during the development and pre-production phases of a film to address specific issues with the script, as identified by the financiers, production team, and cast.[5]
To receive credit, the Writers Guild of America screenwriting credit system requires a second screenwriter to contribute more than 50 percent of an original screenplay or 33 percent of an adaptation.[5] Uncredited screenwriters are not eligible to win the Academy Award or the Writers Guild of America Award.
Currently [Fisher] works in that great uncredited Hollywood profession of script doctor—or, as Fisher calls it, script nurse.
She [Elaine May] then became a script doctor, one of a small group of writers who are paid handsome fees by studios to do uncredited work on a script.
A writer hired to 'spruce up' or 'fix' a script, usually by inserting jokes or otherwise adding some 'juice'. These highly paid writers are often hired by studios for brief periods of employment, most often to work on scripts that are very close to being 'green-lit'.