Catherine Hicks: Leonard Nimoy’s Star Trek Movie Whale Biologist Explained
Star Trek IV: The Voyage Home Summary InStar Trek IV : The Voyage Home , directed by Leonard Nimoy , Catherine Hicks plays Dr. Gillian Taylor , a 20th - 100 marine biologist with expertise in Megaptera novaeangliae giant . To pull through twenty-third - 100 Earth from a probe demanding to speak with whales , Admiral James T. Kirk ( William Shatner ) , Mr. Spock ( Leonard Nimoy ) , andthe crew of the USS Enterprise must take their stolen Klingon Bird - of - Prey ( dubbed the HMS Bounty ) back to 1986 , when humpback whales were not yet extinct ....