"John died in 2000, so I was unable to thank him for his performances as ... Voyager The first Klingon episode in "Star Trek," 1967's "Errand of Mercy," aired at the end of the first season.

Worf later reveals that Alexander’s dishonor is also his, thanks to his failure as a father ... but also gave fans in-depth looks at Klingon culture. Worf, the Enterprise’s Klingon security ...