When a mysterious alien vessel threatens Earth, Spock discovers that the key to survival lies in the song of the extinct humpback whale. With no other ship available to intervene, Kirk and his crew take their Klingon Bird of Prey back in time to bring back two live specimens. With its time-traveling theme and environmentally friendly message, Star Trek IV remains one of the series’ most beloved, with Leonard Nimoy once again in the director’s chair.

This deluxe two-disc edition features commentary by William Shatner and Leonard Nimoy, text commentary by Michael and Denise Okuda (co-authors of The Star Trek Encyclopedia), making-of featurette, time travel featurette, "Kirk’s Women" featurette, a Gene Roddenberry tribute and more.