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William Shatner had a star-making role as Captain Kirk in the cult sci-fi series "Star Trek." Look through the gallery for updates on Shatner and his "Star Trek" co-stars. CBS/Getty Images
Shatner has since starred in "T.J. Hooker," "Rescue 911" and "Boston Legal," as well as a slew of "Star Trek" movies. And, of course, those Priceline commercials. The actor, who recently turned 85, is now in the news for a paternity lawsuit. Kirk McKoy/Los Angeles Times/Getty Images
Walter Koenig was brought in for the show's second season to play Chekov, the navigator of the starship Enterprise. He bore some resemblance to members of the Beatles. CBS/Getty Images
Koenig stayed in the world of "Star Trek" for six follow-up movies and had a recurring role on space drama "Babylon 5." David Livingston/WireImage/Getty Images
George Takei portrayed Lieutenant Sulu on the "Star Trek" series and in the subsequent movies. CBS/Getty Images
With his distinctive voice, Takei is now best known for his social media presence and activism for gay rights. He also had a stint announcing on Howard Stern's show, and on the series "Heroes" and "The Neighbors." Andrew Harrer/Bloomberg/Getty Images
Nichelle Nichols broke barriers as one of the first black women on TV who was not playing a servant. Her character, Uhura, shared a kiss with Captain Kirk -- believed to be the first interracial kiss on television. CBS Paramount Television/Getty Images
After working on "Star Trek" films and the TV series "Heroes," Nichols is very involved in the space and science world. She makes frequent appearances at sci-fi conventions. Barry Brecheisen/Invision/AP
As the often-exasperated Dr. "Bones" McCoy, DeForest Kelley was a fan favorite. He died in 1999. Hulton Archive/Getty Images
Fans love imitating the brogue of James Doohan's Scotty, who continued the role in many "Star Trek" films. He also stayed in science fiction with the Saturday morning show "Jason of Star Command." Doohan died in 2005. CBS/Getty Images
The world mourned when Leonard Nimoy died in February 2015. His portrayal of Commander Spock, the Enterprise's logical, part-Vulcan science officer, won him many fans. After "Star Trek," Nimoy appeared in many TV shows and movies, wrote two autobiographies and directed the 1987 film comedy "Three Men and a Baby." CBS/Getty Images
