Jane Wyatt, best known for her role as Robert Young's TV wife on the long-running Father Knows Best in the 1950s and early '60s, died Friday of natural causes in Los Angeles at age 96, her son Christopher Ward said Sunday. She appeared in numerous TV shows and films over the years, beginning in the 1930s, ranging from Lost Horizon to Gentleman's Agreement to Amityville: The Horror Goes On to Star Trek IV: The Voyage Home (in which she played Spock's mother, a role she also played in the original TV series).