Guest Stars Susan Oliver as Vina Co Starring Leonard Nimoy as Mr. Spock Majel Barrett Roddenberry as Number One Peter Duryea as Lt. Jose Tyler John Hoyt as Dr. Philip Boyce Laurel Goodwin as Yeoman J. M. Colt Uncredited Meg Wyllie as The Keeper Bob Johnson voices First Talosian Grace Lee Whitney as Illusion Princess Jon Lormer as Dr. Theodore Haskings Robert Phillips as Space Officer (Orion) Leonard Mudie as Survivor