director's cut

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The version of a film in which the editing process is overseen, executed, or approved by the director, usually including footage not included in the standard release.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun film A specially edited version of a film that is supposed to represent the director's own approved edit of the film, and is released some time after the original release of the film.