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 David L. Ross as Lt. Galloway John Winston as Transporter Chief Joan Collins as Sister Edith Keeler Bart La Rue voices Guardian Hal Baylor as Policeman John Harmon as Rodent Uncredited Eddie Paskey as Lt. Leslie Dick Cherney as Passerby on Sidewalk