Notable guest appearances Guest roles on the series have featured actors such as: Gary Lockwood and Sally Kellerman in "Where No Man Has Gone Before"; Diana Muldaur in "Return to Tomorrow" and "Is There in Truth No Beauty?" (Muldaur also appeared throughout the second season of Star Trek: The Next Generation as the Enterprise-D's chief medical officer, Dr. Pulaski); Ricardo Montalbán as Khan Noonien Singh in "Space Seed". He then reprised the role in the film Star Trek II: The Wrath of Khan; Madlyn Rhue as Lieutenant Marla McGivers in "Space Seed". Michael Ansara as Klingon commander Kang in "Day of the Dove", reprising the role in the Deep Space Nine episode "Blood Oath" and the Voyager episode "Flashback"; William Marshall in "The Ultimate Computer"; Julie Newmar in "Friday's Child"; Kim Darby and Michael J. Pollard in "Miri"; Robert Lansing and Teri Garr in "Assignment: Earth"; William Windom in "The Doomsday Machine"; John Colicos as the Klingon Commander Kor in "Errand of Mercy," reprising the role in three episodes of Deep Space Nine; Robert Walker Jr. in "Charlie X"; Lee Meriwether in "That Which Survives"; Roger C. Carmel and Karen Steele in "Mudd's Women". Carmel returned in "I, Mudd"; France Nuyen in "Elaan of Troyius," possibly the first Vietnamese actress to appear on American television; Mark Lenard, the only actor to play members of three major non-human races in The Original Series, as the Romulan commander in "Balance of Terror," the Klingon Commander in Star Trek: The Motion Picture, and most notably as Spock's father Sarek in "Journey to Babel," reprising this role in the films Star Trek III: The Search for Spock, Star Trek IV: The Voyage Home, and Star Trek VI: The Undiscovered Country, as well as in the TNG episodes "Sarek" and "Unification, Part 1"; Jane Wyatt as Spock's mother Amanda Grayson in "Journey to Babel," reprising the role in the film Star Trek IV: The Voyage Home; Glenn Corbett and Elinor Donahue in "Metamorphosis"; Elisha Cook Jr. and Joan Marshall in "Court Martial"; Nancy Kovack in "A Private Little War"; Vic Tayback and Anthony Caruso in "A Piece of the Action"; Jeff Corey and Fred Williamson in "The Cloud Minders"; Barbara Bouchet and Warren Stevens in "By Any Other Name"; Michael Forest and Leslie Parrish in "Who Mourns for Adonais?"; Charles Napier in "The Way to Eden"; Frank Gorshin and Lou Antonio in "Let That Be