"The Way of the Warrior" is the first episode from the fourth season of the American syndicated science fiction television series Star Trek: Deep Space Nine, counting as the 73rd and the 74th episodes overall as it is a double-length episode. Michael Dorn joins the cast of Deep Space Nine as Worf, a character originating on the preceding series, Star Trek: The Next Generation. Set in the 24th century, the series follows the adventures on Deep Space Nine, a space station located near a stable wormhole between the Alpha and Gamma quadrants of the Milky Way Galaxy. In this episode, war breaks out between the Klingons and the Cardassians, two alien races with unsteady alliances with the United Federation of Planets; the Klingons' aggression jeopardizes the peace between them and the Federation, and Worf, as the only Klingon officer in Starfleet, is brought in to deal with the situation. In the chronology of the fictional Star Trek universe, this takes place one year after the events of the film Star Trek Generations, Worf's previous appearance. "The Way of the Warrior" ranked third in its time slot with a Nielsen rating of 8.5. The episode introduces a new version of the opening credits sequence, which would continue to be used for the remainder of the series. Source: Wikipedia (en)