Exploration Science and civilization 9 Space flight 9 Space ships Interplanetary voyages 7 Scott, Montgomery (Fictitious character) 7 Sulu, Hikaru (Fictitious character) 7 more ... Exploration of outer space 5 McCoy, Leonard (Fictitious character) 5 Human-alien encounters 4 Enemies 3 Kirk, James T. (Fictitious character) 3 Spock (Fictitious character) 3 Enterprise (Imaginary space vehicle) 2 Closed caption video recordings 1 Friendship 1 Resurrection 1 Video recordings for the hearing impaired 1 less ...