Script

Inciting incident

Also called Catalyst

What is inciting incident in film production?

An inciting incident is the event that disrupts the protagonist's ordinary world and sets the main story in motion. In a feature screenplay it usually lands in the first ten to fifteen pages, and the story that follows is the protagonist's response to it.

It should be something that happens to, or is chosen by, the protagonist — not background. A good test: if you removed it, would the rest of the film still need to happen? If yes, it is not the inciting incident.

Screenwriting books disagree on vocabulary — Save the Cat calls it the Catalyst — but agree on its job: to create the question the rest of the script answers.

Reviewed 2026-10-09

Related terms

Logline: A logline is a one- or two-sentence summary of a screenplay that names the protagonist, what they want, and what stands in the way. It is the first thing a producer, agent or competition reader sees, and it has to make them want to read the script before they have read a page of it.
Beat sheet: A beat sheet is a list of the major story events in a screenplay, in order, each written as a short line or paragraph. It lays out the structure — where the inciting incident, midpoint and act breaks fall — so the story can be tested and rearranged before scenes are written.
Act break: An act break is the point in a screenplay where one act ends and the next begins, marked by a decisive turn that changes the protagonist's situation. In a three-act feature the main breaks fall roughly a quarter and three-quarters through; in television, act breaks often sit before commercial breaks.