When a mysterious alien power threatens the atmosphere of Earth in the 23rd Century, Kirk and his crew must time travel back to 1986 San Francisco to save mankind. Exploring this strange new world, they encounter punk rock, pizza and exact-change buses that are as alien as anything in the far reaches of the galaxy. This thrilling, action-packed, and often hysterical installment of the original motion picture saga looks better than ever on Blu-ray, boldly remastered from a 4K scan of the original film elements.