Deleted scene is a segment of footage which was filmed for the movie, but was not used in the final cut. There are various reasons why these scenes are deleted, which include time constraints, relevance, quality or a dropped story thread. Most of the deleted scenes can be found on the DVD and Blu-ray, but some of them can only be found on the trailer, or even stills. All deleted scenes are considered non-canon unless stated otherwise by the shows producers.
A list of deleted scenes from each movie can be found on the following articles: