On their way home to face a host of criminal charges, the former Enterprise crew learns that a mysterious space probe is threatening Earth with certain destruction. Now, Kirk and company must travel back in time to the 1980s to bring a pair of humpback whales to the 23rd century in the hopes they'll be able to communicate with the probe and save the planet. William Shatner, Leonard Nimoy (who also directed), DeForest Kelley, Catherine Hicks star. 118 min. Widescreen; Soundtracks: English Dolby TrueHD 7.1, French Dolby Digital stereo; Subtitles: English, French; audio commentary; featurettes; storyboards. Two-disc set.