Real world article
(written from a production point of view)
Michael Danek (born 5 May 1955; age 69) is an actor who played the Klingon Kahless actor in the Star Trek: The Next Generation seventh season episode "Firstborn". He was credited as "Singer" in the end credits of the episode.
Danek also made guest appearances in Wings (1994, starring Steven Weber, with Marjean Holden), Women of the House (1995, with Terri Garr, William Newman, and Jonathan Banks), and Law & Order: Special Victims Unit (2003, starring Mariska Hargitay, with Leland Orser).