Gary Graham, a veteran actor best known for portraying Ambassador Soval on the television show “Star Trek: Enterprise” and the detective Matthew Sikes in the “Alien Nation” franchise, died on Monday at his home in Spokane Valley, Wash. He was 73.

 

His death was confirmed by his wife, Becky Graham, who said the cause was cardiac arrest.
After studying pre-med at the University of California, Irvine, Mr. Graham’s first credited role came in 1976, when he appeared in an episode of “The Quest,” a western series starring Kurt Russell and Tim Matheson. That role led to appearances in “Starsky and Hutch,” “The Incredible Hulk,” “The Dukes of Hazzard” and other television series.

His first regular role in a series was in the “Alien Nation” franchise, which began as a 1988 film starring Terence Stamp, Mandy Patinkin and James Caan. In 1989, Fox adapted it as a television show about extraterrestrials adjusting to life in Los Angeles and trying to blend in. Mr. Graham was cast as Matthew Sikes, the human detective whom Mr. Caan had played in the film. He was paired with Eric Pierpoint as George Francisco, a “Newcomer,” as members of the alien species were called.
The show ran for only one season, but it was rebooted for multiple television movies, including “Alien Nation: Dark Horizon” in 1994 and “Alien Nation: Body and Soul” in 1995.