Gary Graham, acclaimed for roles in "Alien Nation" and "Star Trek," passed away at 73 due to cardiac arrest. 

The news was confirmed by his wife, Becky Graham 

Graham's career spanned decades, starting with TV appearances on shows.

Graham's career starting TV shows like "The Quest," "Starsky & Hutch," and "Eight Is Enough." 

He made his film debut in 1979's "Hardcore" 

Graham's breakthrough came with the lead role in "Alien Nation, 

Graham left an indelible mark on "Star Trek"

His "Star Trek" journey began in 1995 on "Voyager" 

Graham is fondly recalled by ex-wife Susan Lavelle as an "amazing actor and father" to their daughter, Haylee Graham.