Special edition of the third Star Trek movie with a bonus disc containing over 2 hours of extra material. Disc 1 contains the main feature + Audio commentary from director Leonard Nimoy, writer-producer Harve Bennett, director of photography Charles Correll, and actor Robin Curtis + text commentary by Michael Okuda and Denise Okuda (co-authors of the Star Trek Encyclopedia). Disc 2 is loaded with extra features, including the Star Trek Universe, storyboards, photos, & much more.