Guest Stars DeForest Kelley as Dr. Leonard Horatio "Bones" McCoy James Doohan as Lt. Cmdr. Montgomery "Scotty" Scott Nichelle Nichols as Lt. Nyota Uhura George Takei as Lt. Hikaru Sulu Grace Lee Whitney as Yeoman Janice Rand Co Starring Majel Barrett Roddenberry as Nurse Christine Chapel Bruce Hyde as Lt. Kevin Thomas Riley Stewart Moss as Joe Tormolen John Bellah as Laughing Crewman William Frederick Knight as Amorous Crewman