chiropractor warned that the cast members risked permanent skeletal injury, new two-piece wool uniforms replaced the first two seasons' extremely tight spandex uniforms. The season finale, the critically acclaimed episode "The Best of Both Worlds", was the first season-ending cliffhanger, a tradition that continued throughout the remainder of the series. The season ran from 1989 to 1990. The Season 3 finale and bridge to Season 4, "The Best of Both Worlds" went on to be one of the most acclaimed Star Trek episodes noted by TV Guides "100 Most Memorable Moments in TV History", ranking 70th out of 100 in March 2001. It has routinely been ranked among the top of all Star Trek franchise episodes. Season 4 (1990–1991) Brannon Braga and Jeri Taylor joined the show in its fourth season. The fourth season surpassed the Original Series in series length with the production of TNGs 80th episode, "Legacy". A new alien race, the Cardassians, made their first appearance in "The Wounded". They later were heavily featured in Star Trek: Deep Space Nine. The season finale, "Redemption", was the 100th episode, and the cast and crew (including creator Gene Roddenberry) celebrated the historic milestone on the bridge set. Footage of this was seen in the Star Trek 25th-anniversary special hosted by William Shatner and Leonard Nimoy, which aired later in the year. Seven fourth-season episodes were nominated for eight Emmys. "The Best of Both Worlds, Part II" won for both Outstanding Sound Editing in a Series and Outstanding Sound Mixing for a Series. Character Wesley Crusher leaves the series in season four to go to Starfleet Academy. "Family" is the only TNG episode where Data does not appear on-screen. The season ran from 1990 to 1991. Season 5 (1991–1992) The fifth season's seventh episode, "Unification", opened with a dedication to Star Trek creator Gene Roddenberry (though the prior episode, "The Game", aired four days after his death). Roddenberry, though he had recently died, continued to be credited as executive producer for the rest of the season. The cast and crew learned of his death during the production of "Hero Worship", a later season-five episode. Seven fifth-season episodes were nominated for eight Emmys. "Cost of Living" won for Outstanding Individual Achievement in Costume Design for a Series and Outstanding Individual Achievement in Makeup for a Series, and "A Matter of Time" and "Conundrum" tied for Outstanding Individual Achievement in Special Visual