Exploration Human-alien encounters 8 Science and civilization 7 Space flight 7 Space ships 7 Extraterrestrial beings 6 Exploration of outer space 5 more ... Interplanetary voyages 5 McCoy, Leonard (Fictitious character) 5 Scott, Montgomery (Fictitious character) 5 Sulu, Hikaru (Fictitious character) 5 Kirk, James T. (Fictitious character) 3 Spock (Fictitious character) 3 Enemies 2 Enterprise (Imaginary space vehicle) 2 Closed caption video recordings 1 Friendship 1 Resurrection 1 Video recordings for the hearing impaired 1 less ...