Which actress played Mr. Spock's mother (Amanda) on the original "Star Trek" series as well as in "Star Trek IV: The Voyage Home"?

On the original "Star Trek" series as well as in "Star Trek IV: The Voyage Home", Jane Wyatt play Amanda Grayson. She was Spock's mother. Wyatt reprised the role that she had previously played in the 1967 "Star Trek" episode "Journey to Babel". Also, during the film, Mark Lenard played Ambassador Sarek; he was Spock's father.

At the time that Wyatt was making the movie, she commented that although she generally disliked working with actors who were directing, she found Nimoy an excellent exception. He could concentrate on being part of the cast as well as setting up the crew (the actors and actresses performing in the film).