Klingon Kruge – Christopher Lloyd
Doc Brown himself, folks. It was suggested to Lloyd to go for the role of Klingon Kruge by fellow actor and friend Leonard Nimoy actually. The rest is historyLt. Saavik .
Lt. Saavik – Robin Curtis
Custis is most known for having replaced Kirstie Alley in the role of the Vulcan Lieutenant Saavik in the films Star Trek III: The Search for Spock and Star Trek IV: The Voyage Home. She would go on to star in other film and television shows, along with stage and commercial work. However she retired from acting in 1999.