Star Trek IV: The Voyage Home 
 IMDb
To save Earth from an alien probe, Admiral Kirk and his fugitive crew go back in time to 20th centur.. To save Earth from an alien probe, Admiral Kirk and his fugitive crew go back in time to 20th century Earth to retrieve the only beings who can communicate with it, humpback whales. (IMDB) More >> << Less
Cast
William Shatner, Leonard Nimoy, Deforest Kelley