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 Alfred Ryder as Prof. Robert Crater Vince Howard as Crewman Michael Zaslow as Darnell Bruce Watson as Green Francine Pyne as Nancy III Co Starring Jeanne Bal as Nancy Crater Uncredited Sandra Lee Gimpel voices M-113 Creature