When a huge alien probe enters the galaxy and begins to vaporize Earth's oceans, Kirk and his crew must travel back in time in order to bring back whales and save the planet.
William Shatner
as Kirk
Leonard Nimoy
as Spock
DeForest Kelley
as McCoy
James Doohan
as Scotty
George Takei
as Sulu
Walter Koenig
as Chekov
Nichelle Nichols
as Uhura
Mark Lenard
as Sarek
Jane Wyatt
as Amanda
Majel Barrett
as Commander Chapel
Robert Ellenstein
as Federation Council President
John Schuck
as Klingon Ambassador
