Admiral Kirk and his crew hijack the decommissioned Enterprise to recover the body of their fallen comrade Mr Spock from the planet Genesis. Kirk has learnt that the science officer's spirit is still alive, and the Vulcan can be resurrected, but he must also battle Kruge, a Klingon captain determined to control the planet's mysterious energy. Sci-fi sequel, directed by Leonard Nimoy, with William Shatner, DeForest Kelley and Christopher Lloyd