Spring Byington guest stars as the mother of astronaut Tony Nelson (Larry Hagman). Dropping into her son's house on what is supposed to be a brief visit, Mama Nelson concludes that Tony is helpless without her, and decides to stay permanently. Of course, this spells trouble for Jeannie (Barbara Eden), who is going to have quite a time keeping her presence (and her identity) a secret. Though Spring Byington delivers a superb performance, it would have been interesting had actor Larry Hagman's mother been played by Barbara Bel Geddes...or even Mary Martin. ~ Hal Erickson, Rovi